Lot of countries do not allow to use cryptos because they were afraid on the negative effects on it like cryptos maybe use in funding syndicate, these cryptos will become bank competitors and the government have not yet study where they will get taxes out of cryptos.
In my opinion, instead of being taxed from a bank, they can tax crytles. Earn income from crytal taxation and bring the economy to a new height. This is completely reasonable and can be drunk in the future