Isn't there really any service that lets you buy and use USD, EUR, GBP... online? And if not, would you still continue to buy crypto if one of these currencies was available?
Bitcoin is so far not heavily regulated, but presumably will be. But it doesn't provide the scrumptious, juicy central point of control that the Banco Central de la República Argentina does; regardless of what the law says, there's no practical way to confiscate every Argentine's Bitcoin savings between sunset and sunrise.