Payment currencies evolve from time to time, starting from the barter era, until they find payment instruments in the form of money. and now the world is starting to develop very rapidly, now is the digital era, but I don't think the world will remove fiat money and replace it with this kind of payment.
Exactly! Most of the time from the days of our forefathers, we have seen different strategies being used in exchanging value for something and now paper currency which was the previous will at some point end up going extinct.
Apparently, we all know the world cannot just discard fiat completely and we would still have our centralized world probably on the blockchain eventually, but as it is, we still expect there would be a hand in hand kind of thing as we forge ahead.