Nowadays some of countries are beginning to control cryptos, others ban it, and some countries legitimate crypto as means of payment.
It think that banning is narrow-minded decision of a country.
Legitimating is very prospect policy of a country. But legitimacy is impossible without regulation by authorities. So if citizens want crypto to become official means of payment they should accept it that it'd be regulated.
And of course not all governments want and can regulate cryptos. e.g. Third World countries are far from it