i think someday crypto really can change fiat fully, like rightnow in pandemic the virtual payment on e-wallet really help people to do some trancaction
But it doesn't mean cryptocurrencies have the upper hand.
There are a lot of mobile wallets that offer payments using Bitcoin and other cryptocurrencies but I don't think people are actually using it right now since the halving is closing and people would be thinking to just save or hold it rather than selling it. That just means that despite the chance that we are seeing people would use cryptos, they are not. And another thing is that not all of the people are actually interested in using it and usually, people don't know what it is.