I do agree with you, but if you look at this again, it is not a reality, just a mere expectation, which in fact we do not know what will happen in the future to BTC itself, maybe BTC can indeed be used as a digital world currency, but to be used as a state currency. the global currency is still very far from the existing reality, it can be seen from the many government regulations that prohibit the circulation and transactions of using BTC in their countries.