In 2010, a Florida man parted with 10,000 units of a new-fangled anarcho-currency thing called “bitcoins” in return for two hot, fresh, tasty pizzas. At the time, that was about $40 worth of these “buttcoins” (NSFW), so that was already quite an expensive pizza. (Must’ve been a pretty serious case of the munchies.) Three years later, and Bitcoin has boomed, busted, and boomed again. It’s been used by Cypriots, Iranians, dope fiends, and people who just want to buy a pizza without Big Brother knowing whether or not they like anchovies.