even though cryptocurrency is our future,it still needs Fiat to value its price at this moment.
also in our real life we need a physical form to do the transaction,that was why people still used it as a form of payment in our life.
but it's totally different if we are talking about it in form of digital currency,
cryptocurrency will be used as a form of payment when we are using it on form of digital.
coexist is must,cryptocurrency needs fiat to survive at this moment and it can not overtake its place.