Suddenly
No Punting
The two main reasons I can think of off the top of my head for regulating the movement of money around the world are to make it harder to launder the proceeds of crimes and to prevent the evasion of taxes.
Neither money laundering nor tax evasion are good for me as a potential crime victim and a user of government services like education, healthcare, roads, law enforcement etc.
This argument assumes government action and regulation is always morally justified.
Whether I agree with the specifics or not, the civil disobedience aspect of crypto presents use cases, and it's global nature a possible check on government overreach both here and abroad.
I'm of the opinion that fiat currency is among the most important human inventions of all time and that crypto is at present non-functional garbage, but that doesn't mean the former can't be abused and the latter not improved.