Do you guys think one day USA may ban cryptocurrencies? If yes what would happen? I think it's not totally impossible and that would be a global crash on prices.
I don't think the USA ban on crypto will make the price fall globally. some time ago also many countries including China which banned Bitcoin and other digital currencies but did not make digital currencies fall in price. that is, even though there are governments that prohibit crypto, there are still many other countries that accept the presence of digital currencies even though they are not used for transactions.