I completely agree that crypto will be the currency of the future. Cryptocurrencies are already used all over the world and constantly more and more countries begin to legalize cryptocurrencies and recognize them as official currencies, this is just a matter of time when the whole world will already fully begin to use cryptocurrencies with its full potential.
How it will happen if other country banning cryptocurrency? Also not all people knows how to use bitcoin and they don't have access to the internet or either they don't have gadgets to use for online transactions like bitcoin and other cryptocurrencies. Still need more time before it will use as a currency like our fiat.
banning is just an empty word if there's no punishment. most of the countries are now regulating it instead of banning because they know that there's always a way for them to tax the crypto users since most of the crypto users are using exchange and government could cooperate with them.