Fiat is a strong currency and is a provision in the economic system which in my opinion wouldn't replaced ever even though many new things have emerged, it's one of the important things and has become a characteristic as well as has become a permanent thing I guess.
Human life can indeed be more modern than before, but nevertheless, fiat will not be replaced even disappear. well even though there are not many reasons that I can convince it, but I really believe and can ensure that it is the most priority thing by the Countries.