Of course, I apologize, but in what places did cryptocurrencies replace fiat? I dont see, there are especially many places where you could pay with cryptocurrencies without converting them into fiat currencies, either directly, using exchangers, or other methods.
There's no play, though in the most develop cities where they have a good internet connection and digital currencies are widely used, they can't still beat the volume of money going in and out which are fiat, therefore let us not think that crypto will replace fiat because it's tantamount to saying that decentralize system will replace the centralized system, not gonna happen.