Well, generally I believe this is not possible because the governments wish to exercise control of their currency, so, it cannot happen with cryptos and even more with the centralized ones.
However, my opinion is that it might happen in the future, especially when we speak about countries which support tax evasion called 'tax haven' to use one of them as main currency.
So they would probably let crypto owners to use their bank system, anonymously and untraceable to avoid taxation.