We cant say goodbye to using fiat currency since its a physical asset as means of mode of payment from our day to day life. Maybe if Bitcoin will be accepted thoroughly and globally instead maybe theres a chance of not using fiat anymore.
right, to get to such conditions i think it still takes a long time. there are still many countries that are not ready to legalize cryptocurrency, with various problems, such as money laundering and terrorism
yes that is true, besides there are still many countries that oppose crypto there are still many countries that are not ready to use crypto because the facilities and infrastructure are still inadequate for all using crypto, so it's still very long to say goodbye to fiat and USD.