Crypto illegalization depends on what country it is. So even though its legal for you to acquire crypto, if you want to buy something or send some of it on those people who lived in a total ban crypto then that would be useless. And also, here in my country, you cannot establish a company if you arent a citizen but you can open a bank account.
Knowing what are the certain rules for that country will help. You need to identify and must follow the law if they have any rule of law regarding owning, transacting and trading with crypto's.
IMO as long as there's no direct law about it, there's nothing wrong with that.