1. Two main ways to make money: There are two ways to make money with crypto.
2. You can't 'withdraw' bitcoins into your bank account, any more than you could 'withdraw' a car into your bank account. You have to sell them in exchange for money, and then you can deposit the money in your bank account. See How can I sell bitcoins and transfer the funds to my bank account?
3. So if you bought a pizza with bitcoin, you would have a disposition of the bitcoin equal to the cost of the pizza (the fair market value) in dollars. Airdrops and tax implications. If you received free crypto through an airdrop, how the crypto is used will have an impact on how it is taxed.

Some people kill time at the airport by browsing duty-free shops. I decided to shop for bitcoin.

But first, there are two things you should know about me: I tend to be almost as afraid of losing money investing as I am of flying. On some level, I figured one fear might cancel out the other.

After selling to your Coinbase fiat wallet, you can opt to either withdraw funds to your US bank account or repurchase cryptocurrency on the platform. To sell cryptocurrency: Select Buy / Sell on a web browser or tap on the Coinbase mobile app. Select the crypto you want to sell and enter the amount you want to withdraw.

So last Thursday, while waiting for a flight to Nashville, I pulled up a popular application called Coinbase that can be used to buy and sell bitcoin. The virtual currency had hit $10,000 for the first time a couple days earlier, before retreating somewhat. News of bitcoin's rapid rise was everywhere, including on CNN.

For 15 minutes at the airport, I refreshed the price of bitcoin over and over, watching as it gained and lost hundreds of dollars in a matter of minutes. I called out the price fluctuations breathlessly to my wife, who gently encouraged me not to be an idiot, before returning to her magazine.

She was in good company. JPMorgan Chase CEO Jamie Dimon recently called bitcoin a 'fraud' and suggested people who buy it are 'stupid.' Warren Buffett called bitcoin a 'mirage' in 2014 and warned investors to 'stay away.'

Are you trading Bitcoin? We want to hear from you.

And yet bitcoin has climbed more than tenfold since Buffett's warning. Earlier this month, one college friend casually told me over drinks he'd made tens of thousands of dollars investing in another cryptocurrency. He said he hoped it would be worth enough one day to buy a house.

When I saw the price of bitcoin fall to $9,500, I pressed buy, defying the wisdom of two finance titans and my wife. One hundred dollars, or 0.0101 bitcoins. (A few days later, I bought another $150.) By the time we got to our hotel, my stake had already gone up 10%. One week later, it was (briefly) up 100%. My wife's opinion of me has reportedly decreased by the same amount.

What is happening?

It's an investing frenzy, plain and simple.

Bitcoin cracked $1,000 on the first day of 2017. By this week, it was up to $12,000, and then it really took off: The price topped $17,000 on some exchanges Thursday, and $18,000 on at least one.Other cryptocurrencies have seen similar spikes, though they trade for much less than bitcoin.

There's a long list of factors people may point to in an attempt to explain this. Regulators have taken a hands-off approach to bitcoin in certain markets. Dozens of new hedge funds have launched this year to trade cryptocurrencies like bitcoin. The Nasdaq and Chicago Mercantile Exchange plan to let investors trade bitcoin futures, which may attract more professional investors.

Yet a key reason the price of bitcoin keeps going up is, well, because it keeps going up. Small investors like yours truly have a fear of missing out on a chance to get rich quick. And when the value of your bitcoin doubles in a week, as it did for me, it's easy to think you're a genius. But you can get burned assuming it will keep skyrocketing.

Some investors have likened the bitcoin hype to the dot-com bubble. Others, like Dimon, have said it's even 'worse' than the Dutch tulip mania from the 1600s, considered one of the most famous bubbles ever.

As Buffettput it back in 2014, 'the idea that [bitcoin] has some huge intrinsic value is just a joke in my view.' Bitcoin is not backed by a company's earnings, or the strength of a government and rule of law. There's also no interest or dividends.

Why would anyone want or need to use bitcoin?

Bitcoin serves as a new kind of currency for the digital era. It works across international borders and doesn't need to be backed by banks or governments.

Or at least that was the promise when it was created in 2009. The surge and volatility of bitcoin this year may be great for those who invested early, but it undermines bitcoin's viability as a currency.

Right now, I can use my bitcoin holdings to pay for purchases at Overstock(OSTBP), or book a hotel on Expedia(EXPE). But if I use bitcoin to buy $25 worth of socks on Overstock today, and the price of bitcoin quadruples next week, I'll feel like those socks actually cost me $100. Then again, if bitcoin crashes, at least I'll always have the socks.

Rather than a currency, bitcoin is being treated more like an asset, with the hope of reaping great returns in the future.

So is there anything truly valuable about bitcoin?

Yes, the technology behind it.

Bitcoin is built on the blockchain, a public ledger containing all the transaction data from anyone who uses bitcoin. Transactions are added to 'blocks' or the links of code that make up the chain, and each transaction must be recorded on a block.

Even bitcoin critics like Dimon have said they support the use of blockchain technology for tracking payments.

Is there a legal and legitimate way to invest in bitcoin?

Bitcoin exchanges have a checkered history. Mt.Gox, once the largest exchange, shut down in 2014 after losing hundreds of millions of dollars worth of bitcoin after a hack.

Today, the leading exchange is offered by Coinbase, a startup that has raised more than $200 million from a number of top tier venture capital firms. Square(SQ), the payments service, is also rolling out a bitcoin product.

There are also bitcoin ATMs in scattered bodegas and convenience stores around the country, through companies like Coinsource. The ATMs let you exchange bitcoin for cash, or vice versa by scanning a QR code from the digital wallet application on your phone.

With Coinbase, you must first give the app permission to connect to your bank account. As with other stock trading applications, you pay a small fee for each transaction, buying and selling. But the transaction can take significantly longer.

My original $100 bitcoin purchase won't officially be completed on Coinbase until Friday, more than a week after the transaction. The price I bought it at remains the same, but I won't be able to sell at the earliest until Friday.

If the price plummets before then, I'm out of luck. No socks for me.

-- CNN's Selena Larson contributed to this report.

Ok Bitcoin lovers, what is this chart of?

If you said NOT Bitcoin, well done. If you said Bitcoin, bad luck, this is Bitcoin.

What you were looking at is Microsoft.

People are obsessed with arguing over whether Bitcoin is money, whether Bitcoin is a currency, whether Bitcoin is gonna make them rich.

I’m here to say to you that you already know what it trades like, even if you don’t have a clue what it is. It trades like a hot as hell tech IPO.

This you may have not realized – Microsoft is the big grandaddy of tech IPOs. It went from nowhere to taking most of the profits in the PC business. Now its breaking out as a play on cloud. How can a cryptocurrency be similar to Microsoft?

Chart images: Tradingview

What is Bitcoin?

I’ll give you the tl;dr here: the fundamental value of Bitcoin is a bet on (1) the ultimate share of distributed ledger technology in the financial sector, (2) how long it takes to get there, and (3) Bitcoin’s market share of these distributed ledger technologies.

It can be all these things because it is NOT a currency. It is just pretending. Sure you can use it to buy things but it ain’t a store of value and you actually have no idea what your bank balance is worth if its marked in Bitcoins.

Now jump back to Microsoft in its early days. It was a bet on (1) the number and market share of PCs versus mainframes, (2) the time it would take to get there, and (3) Microsoft’s share of the profits in PCs.

Sound familiar right.

Before we drill into the Bitcoin bet further, I have to start explaining. I kinda always feel a little embarrassed talking about what Bitcoin is. It is freaking complicated, but everyone who cares already knows. If I run you through 101 elliptical curve mathematics, you either don’t give a s h i t or you start correcting my mistakes.

Bad luck for those on either end, I cater for people seeking insights, not Paris Hilton or a Math major from MIT.

Image: Airpix, Flickr Commons

Bitcoin is based on blockchain, which is the handy name for a distributed ledger technology. Ledgers are databases. So naturally it’s a database that’s spread around. I’m going to delve deeper than this, but let’s start by talking about trust. At this point, people often get ahead of themselves and start talking about trustless before trust. But trustless is necessary because trust costs money.

Trust and money

A thousand years ago, I lend my buddy a couple of sheep. As anyone who has mixed money and friendship, it’s the friendship that goes down the pan. He runs off with my sheep and I get a huge hard on of resentment.

“Resentment is like taking poison and waiting for the other person to die”, said Malachy McCourt apparently.

This is the risk of opportunism. A contract based on trust gives the other party an opportunity to do me over.

Image: Zach Copley, Flickr Commons

I always remember, back when I was eight years old, another kid from school asked to borrow £1 from me. Dear readers from elsewhere, this is the money of the United Kingdom. You used to be able to buy twelve loaves of bread with this back in the 1920s.

Now you would be a few slices off a single loaf. Anyways, back when I was a small boy, it was worth two loaves of bread.

The kid never paid me back. I wanted to push him off an extremely high ledge. I ran into him years later; I didn’t mention it but I still wanted to push him off a ledge. His name was Jon and this was when I figured out “hey, I got a pretty good memory!”

This enduring hatred had a good reason. I’d thiefed the money from my mother for chips. No money, no chips.

I trusted him, that trust wasn’t worth the fluff on his butt cheeks.

What I needed was a go between. I needed a big kid that could kick his ass to make sure he paid up. I needed a bank.

Trust in sticks

Banks are referred to as a trusted counter party. They aren’t trusted, they aren’t counter and there definitely isn’t a party back at theirs. But they carry a big stick: lawyers, debt collectors, bounty hunters. You want to make your life a misery? Go do over a bank.

Trusted counter parties come in many forms. They might be a bank. They might be a clearing house, sitting in the middle of a futures exchange, collecting collateral. They might be your mom, making sure you and your siblings play nice.

Image: Francis Storr, Flickr Commons

I quite like counter parties. I definitely needed one when I was eight. Others don’t. Central counter parties mean somebody with power. They can easily make a lot of money just sitting on their big fat ass in the middle. They often do not have your interests at heart.

One person that particularly did not like central counter parties (CCPs) is Satoshi Nakamoto. I use person in a legal sense, in the same way a company can be a person, because we don’t know who this guy, girl or collective is. Nakamoto hated CCPs so much they wrote a stack of amazing, breakthrough code that virtually eliminates the risk of opportunism. They relied on cryptography instead of a trusted central party.

99 problems but Byzantium ain’t one

Commentators like to say that blockchain solves the Byzantine general problem. Before I go there I’m going to have a history moment. If you don’t like history or Muslims, you should probably jump to the next section.

I have always been fascinated by the Byzantine Empire, which was actually the stub end of the Roman empire. By then, this stub of the old Rome was being run by the Greeks out of a town called Byzantine. It got rebranded to Byzantium partly because it’s a cool name, but primarily because they got beat by the Muslim Turks.

We did this even though Emperor Constantine renamed the city itself after himself. In other words, a group of people calling themselves Romans got named after a town they renamed Constantinople: the Byzantine Empire.

People just did not want to admit that it was the Muslims that ended the Roman Empire. They are determined to pretend it was white Germans.

Before you email in to complain, yes Germanic tribes did seize what we now know as Italy, Spain and France. But for many centuries later, Byzantine would still occasionally control Rome.

Consider when Germany got split in two after WW2. Is East Germany still Germany?

Image: Wikipedia

The Byzantine Empire has a really harsh rep. They lost so they must be weaklings. However, think about the dates. They fought off a waves and waves of Arab and Turkish invaders for centuries. Their first big defeat to the Arabs was in 636. Byzantine, now known as Istanbul, didn’t fall until 1453.

The reputation should be the other way round. If they were weak then Paris would probably have been renamed Pardad and Europe would be Islamic. Byzantium was the meat shield of Christendom for seven hundred years. People forget that there used to be more Christians on the other side of the Mediterranean than on the northern, white European side. Islam ate the world of the 10^th century. It just happened that the next stubby end, the poor part of Christendom they did not eat, came to dominate the world of the 15^th century onward.

Branding Algorithms, and no I don’t mean Coke and Pepsi

Interestingly, the Byzantine general problem is also a clever rebrand. Three computer programmers Leslie Lamport, Robert Shostak and Marshall Pease had an algorithm to solve a systems failure issue. You have a bunch of processes and some of them are faulty. Their algorithm sent lots of messages until it became clear who was using the tippex. The only things that they required were that the messages were unforgettable and that at least two thirds of the generals were loyal (or that two thirds of the processes actually worked).

They used generals and Byzantium to make their algo sound cool. This definitely worked. Never forget the importance of marketing.

So if these guys solved the problem when they wrote the problem, what is blockchain doing?

Blockchain solved coming to a consensus as effectively as their algo, but in a far more elegant way.

Ok, ok, I’ll explain a bit more on Blockchain

There are three things I feel obliged to explain. Ledgers, Digital signatures, and what people say that isn’t true.

You already know that ledgers are databases. Society is built on these things, from your driving license, to your bank balance to your health records. Equally you know that the government controls the first, your bank holds your money and your hospital or HMO keeps tracks of the last one.

There’s the punch. Blockchain opens the possibility of getting rid of your HMO, your bank and maybe even the government. All these three exist either to establish trust or to fulfill a contract. Blockchain happens to be pretty good at both of these.

Is this gonna happen? Are revolutions ever easy? Personally I suspect these institutions will change, but only a bit. The key problem with Blockchain smart contracts (the rules written in programming code), is there has to be no mistakes right at the beginning. Computer scientists don’t have a problem with this conundrum. If it is there at the beginning, then it is part of the contract. But others would certainly take issue with the many occasions when the details of a smart contract are not the same as the spirit of the contract. I mean have you ever bought a used car?

Image: Mirko Tobias Schafer, Flickr Commons

Digital Signatures

Digital signatures are the cryptographic trick that underlies blockchain. If I give you two big prime numbers, you can tell me the multiplicative sum of the two. You pull out your calculator, and you’ll have the answer as long as you have enough digits on there.

But if I give you the result, you won’t have a clue what I’ve multiplied together. Blockchain doesn’t use prime numbers, they use elliptical curve mathematics.

Now let’s throw in a public key and a private key. One of the inputs you are multiplying (or strictly speaking hashing) is your private key, and the other one is the transaction you want to do. You hash them together and then show off to everybody the result and your public key.

The clever thing about the public key is that other people can use your public key on your result and prove that the private key was used here. They know that a specific identity or wallet was involved in this transaction. They can see your digital signature.

Blockchain misunderstandings

So what do people say about blockchain that isn’t true? Couple of things. Like its immutable. Immutable doesn’t change, whereas the whole point about blockchain is that people say different things and then you’re forced to all agree. If everyone changes their mind, then the blockchain changes its mind. This is what you call mutable.

Blockchain isn’t mathematically 100% secure. Nothing is.

A mega hack might involve launching denial of service (DoS) attacks on all the big mining pools and then hiring all the capacity off of Amazon AWS to do half an hour of Bitcoin mining. This should be able to seize control of the Bitcoin blockchain from the miners that survive your DoS.

Bitcoin is actually game theoretically secure. And maybe that is better. Imagine, if someone did this mega hack, what is Bitcoin worth? Maybe nothing, negating the value of all the money you spent on AWS to steal those Bitcoins.

The other thing that isn’t true relates to the time stamp. I keep seeing people say there’s a time stamp on the blockchain. Time is of course mentioned, but no, Nakamoto dropped the time stamp because whoever gets to stamp the time is guaranteed to be more trusted and more powerful than everyone else. Nakamoto’s original paper mentioned time stamps. In practice it got dropped.

Credit where its due

Satoshi Nakamoto did not come up with digital signatures. Look up Wikipedia if you want to know the many people involved in creating digital signatures. Nakamoto also did not invent the proof of work that underlies Bitcoin mining. That was Adam Back.

Nakamoto’s breakthrough was linking all the public keys and digital signatures and transactions into blocks. He chained these blocks of info and made it totally public. Nakamoto used game theory and coinbase rewards to persuade individuals and companies to spend fiat money to process all this data.

Satoshi Nakamoto invented a third party funded payments processing system and called it a currency.

The Business Model of Bitcoin

• Core developers invest their time to evolve the code base
• Miners invest in specialized equipment to verify and process transactions
• Each block that gets added to the chain earns its miner or mining pool some Bitcoins
• Users get to transact pseudo anonymously at a socialized cost
• Whoever held on to their Bitcoins (devs, users and miners) gets richer and richer

Once upon a time you could mine with graphics cards. Now most Bitcoin miners look like this.

Image: Bitcoin Opp, Flickr Commons

Is crime the killer app of Bitcoin?

Studies have figured out that there are criminal proceeds of illegal activities sitting in Bitcoin wallets untouched all around the internet. Not moving, just sitting. Maybe these crooks are true believers that Bitcoin is the one ultimate currency. But I suspect it is because they do not want to link the criminal activity to a real world account or real world action.

Bitcoin is pseudo anonymous. Certainly I don’t know who owns which Bitcoin or which wallet. However, despite the use of mixers, pretty much every Bitcoin transaction is public and can be linked back to all their prior uses. You try and turn your illegal Bitcoins into US dollars and then deposit it into your bank…however somebody can see that if they care enough.

Bitcoin is the protection of the flock. Yea lots of people are buying drugs on the dark web. But you do something really bad…well then they are watching you. Or more precisely, they are watching your Bitcoins.

Blockchain and Bitcoin: technological breakthrough or latest tulip bubble?

This is the name of the dissertation I wrote for my Masters at SOAS, University of London. If I ever get it published, I’ll link to it here. In it I find empirically that the Bitcoin price is correlated to market inflation expectations. Many have argued this because the total number of Bitcoins in circulation is limited algorithmically. I also give an example of a week where the price of Bitcoin on the Bitstamp exchange and the Kraken exchange are different.

Different is crazy, it means that a US dollar is not the same value in these two virtual locations.

We know what a price bubble is. It is something that goes up, then goes down. Importantly a real bubble stays down.

Tech bubbles often don’t stay down. A couple of guys called Bresnahan and Trajtenberg came up with the name General Purpose Technology for inventions that blow the doors off of the world as we know it. They start with steam engines, electricity and the IT revolution. Maybe the next one is blockchain. Unfortunately for the proving business, this is not quite confirmed yet.

Image: Jonas Lejon, Flickr Commons

What’s the stock market for? It exists to allocate capital. Stocks like hot IPOs go through the roof because its saying we need to spend more money on this stuff. They often bust out because reality cannot live up to the hype.

But look at Microsoft. Look at Burlington Northern. Flick your light switch a couple of times. The reality for all of these turned out bigger than the hype. All that happened in each of these cases is that investors got greedy. And when they get greedy, they get burnt.

There is a large body of academic work, like Pastor and Veronesi (2009) and Greenwood and Jovanovic (1999), that shows how stock prices might go up and down, but underneath it society is taking a big leap forward.

Is Bitcoin a Bubble?

“Bubbles accompany technological disruption. The companies in the bubble may not survive but the technology will. As a result, we may (likely, in my opinion) see a bitcoin correction, however, digital currency is the future – the winners in the space are ‘to be determined’” said Ryan Daily.

I’m going to add something to this. What the academic work found was that often these technologies cannot be owned. Think about it. A single corporation cannot dominate the steam engine business, the electricity business or the blockchain.

A big chunk of Bitcoin’s value comes from the rest of the financial sector refusing to adopt it.

Image: Richard Stephenson, Flickr Commons

I’ve written a lot about rents. Cryptocurrencies collects a rent for (1) socialised cost of transaction processing, (2) pseudo anonymity and (3) eating the financial sector.

It can only do this as long as the financial sector doesn’t do it to itself. Followers of Bitcoin know what Bitcoin Cash is. It’s a hard fork in Bitcoin because of an argument over the future of Bitcoin. Bitcoin became Bitcoin + Bitcoin Cash.

How Do You Get Money Out Of Bitcoin

Sensible people were amazed that not only did Bitcoin Cash end up being worth USD 400 a coin (approx. $10bn market cap), but that the Bitcoin price went up after the split too.

Let’s be clear, the price of normal stuff is supposed to go down when there is more of it. That applies to equities, money and loaves of bread. But not to crypto.

Vitalik Buterin, the founder of Ethereum, argues that this is because the utility functions of cryptocurrency networks are different (u(x)*ln(n) rather than u(x)*n if you’re wondering).

I use the general purpose tech framework to explain this a different way. New cryptocurrencies have the potential to retain economic rents associated with a superior technology. It is non cryptocurrency use cases that eliminates these economic rents.

We had a sell off of the crypto space when Jamie Dimon, CEO of JP Morgan, described Bitcoin as a bubble and seemed to imply that his own daughter was stupid. According to me, this is a buying opportunity. The tough patch for Bitcoin is when JP Morgan announces their own distributed ledger technology network. Or when it says it is going to rip and replace its infrastructure in favor of blockchain.

Bitcoin the IPO

ICOs, or initial coin offerings, are blockchain businesses that seek start-up funding via a sale of coins, or tokens, often exchangeable for their future product or service.

When I say that Bitcoin is an IPO for blockchain technology, I am arguing that Bitcoin is the original ICO.

So far it is the classiest one going.

Other people have thought this before. I’m not being strict with my usage but its selling coins to invest in a service that you can swap the coins for.

Now the academic literature hints that after the steam engine, after IT, and after the Internet got widely adopted, this drove a selloff in the wider stock market. They give a bunch of reasons, but let’s stick with the easiest to grasp: new tech capital destroyed old tech capital.

Image: Wikipedia

I wouldn’t read this through to Bitcoin. Bitcoin is still tiny. As of 19 September 2017, Bitcoin was only equivalent to the 84th largest stock in the S&P 500 index, between Chubb Insurance and Lowe’s. It has gotten bigger than then, but it still ain’t the 32% of the market that the tech sector got to during the Internet bubble.

Roadmap for Bitcoin

How Do I Get Bitcoins

I’m going to put forward a scenario for crypto. This is not a prediction. It’s just a mini story from my febrile imagination.

Can You Make Money With Bitcoin

Bitcoin is the tech prototype for distributed ledger technologies. Normally this happens off market in a private firm. Think Uber and AirBnB right now. Instead we have the most explicitly public development signalling process ever. The Bitcoin price is flashing deploy this tech.

Cryptocurrencies are just the beginning. The real bubble is going to happen when we get some leading firms changing the world with blockchain. Then we are going to see both some big transformations in society and some big blockchain firms to lead the stock market.

No idea when I’ll get time to write again, so here is the affiliate link to BlinkList for those who love a good get smarter read. Take care everybody.