I think it will be difficult to make and legalize bitcoin as the global currency. A bitcoin system that is still very complex, anonymity and uncontrolled by anyone makes it difficult to be accepted by banks and the government, furthermore it will certainly be difficult to legalize it as a global currency.
bitcoin is suitable to be a common currency, but the very free level of anonymity makes many governments wary of various violations, I am amazed that until now bitcoin has not been challenged which means such a full ban, but we need to keep monitoring because this currency can end up being anything and we can only guess.