Money classically has three use cases: a unit of account (I have X dollars in my bank account, Y dollars in my 401(k), etc.); a medium of exchange (I trade my labor for dollars and trade those dollars for rent, food, etc.); and a store of value (I save up for a house, car, engagement ring in dollars because I expect them to be fairly stable).

Nobody in the real economy uses crypto as a unit of account. Most tokens are too volatile to be very useful as media of exchange, and this use case has traditionally been limited to goods (drugs) and services (hitmen) you can’t legally buy in the dollar system. “Store of value” is in the eye of the beholder, of course, but generally speaking you don’t want your store of value to be something that can depreciate 40% against the dollar in two days.