Bitcoin will never replace fiat cash. A coin everyone mints at the same rate will. It will also replace bitcoin and all of the shitcoins.
Mark my words.
Bitcoin runs off the fumes of fiat.
Where in the world that the word Replacing Fiat comes from?
Bitcoin will never tend to replace the currencies instead this will help,only People like you are the one whos pushing this stupid idea when we cannot find that in Satoshi's plans.
Bitcoin will serve the world but not because of the losing of fiat instead both will work together and fill what is the missing on the other.