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Socially, cryptocurrency is a coordination game; people want to have the coin that other people want to have, and some sort of abstract technical equivalence doesn’t make one cryptocurrency a good substitute for another. Social acceptance—legitimacy—is what makes a cryptocurrency valuable, and you can’t just copy the code for that.

A thing that worked exactly like Bitcoin but didn’t have Bitcoin’s lineage—didn’t descend from Satoshi’s genesis block and was just made up by some copycat—would have the same technology but none of the value.

Here’s another generalization of Bitcoin: Satoshi made up an arbitrary token that trades electronically for some price. The price turns out to be high and volatile. The price of an arbitrary token is … arbitrary?

it’s very interesting as a matter of finance theory. Modern portfolio theory demonstrates that adding an uncorrelated asset to a portfolio can improve returns and reduce risk.

To the extent that the price of Bitcoin 1) mostly goes up, though with lots of ups and downs along the way, and 2) goes up and down for reasons that are arbitrary and mysterious and not tied to, like, corporate earnings or the global economy, then Bitcoin is interesting to institutional investors.

In practice, it turns out that the price of Bitcoin is pretty correlated with the stock market, especially tech stocks

Bitcoin hasn’t been a particularly effective inflation hedge: Its price rose during years when US inflation was low, and it’s fallen this year as inflation has increased.

The right model of crypto prices might be that they go up during broad speculative bubbles when stock prices go up, and then they go down when those bubbles pop. That’s not a particularly appealing story for investors looking to diversify.

one important possibility is that the first generalization of Bitcoin, that an arbitrary tradeable electronic token can become valuable just because people want it to, permanently broke everyone’s brains about all of finance.

Before the rise of Bitcoin, the conventional thing to say about a share of stock was that its price represented the market’s expectation of the present value of the future cash flows of the business.

But Bitcoin has no cash flows; its price represents what people are willing to pay for it. Still, it has a high and fluctuating market price; people have gotten rich buying Bitcoin. So people copied that model, and the creation of and speculation on pure, abstract, scarce electronic tokens became a big business.