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.
The crypto market exists in cyberspace by using the internet, meaning that transactions will not be known by anyone and do not violate anything.
Becomes illegal if transactions in a country prohibit the use of bitcoin but are used for payment or open trade. If in a country that legalizes crypto, of course there are no problems.