The jury is out on whether Bitcoin will ever stand side by side with centrally managed currencies such as the dollar. So far, it flunks the test: as a unit of measurement, it hasn’t made the cut. People still by and large set prices in traditional currencies, even if they then convert them into bitcoin. As a medium of exchange, it can be used in some stores, in virtual settings, and for various illicit activities; but has not become generally accepted, let alone "legal," tender. And as a store of value, it remains incredibly unreliable because of how much its price jumps around.