Some day I sure bitcoin can replace fiat, we know fiat is is not relevant to the economy and free trade.
But it is a basic true that bitcoin cannot replace fiat, fiat has been and will forever be the way to exchange money between people directly, bitcoin appeared first to make exchanging money over the internet much easier so it has always been related to the internet but if the internet goes down so is the bitcoin and then what is the thing that is goanna run the economy for sure it is the fiat money.