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.
If you live in a country where crypto is totally banned, then acquiring and holding bitcoin or any other coin is illegal for that matter, having a total ban and having restrictions are two things entirely, if it is not regulated, then there is nothing to worry until they come up with some sort of regulation in the future. You cannot establish a company dealing with virtual currency if it is unregulated, until there is any sort of instruction from the ruling government.