both are useful and people in all walks of life use them, fiat are what people known as mode of payment, transaction and among other but there introduce another and new way of money which is cryptocurrency and it has advantageous to growing economic countries it made all their way of communicating, transaction, payment and bills and other easier and convenient. no hassle and it elevate their way of life too.
Yes, I completely agree with your opinion but talking about cryptocurrency as a new payment method, it seems like only a few countries are ready for that,
but I also believe that with the development of the times it is possible that it will become a new payment method or transaction for the whole world,
because cryptocurrency provides great benefits of course