Bitcoin Is An Implausible Currency

“So when I ask “What is bitcoin good for?” the answer I come up with is “not enough to justify anything like these valuations.” There are all sorts of interesting applications for cryptocurrencies and blockchains. But unless they become a global currency, or a global payment system, I don’t see why, 50 years from now, anyone is going to be willing to pay tens of thousands of dollars to get their hands on one.”