Fiats integration in society is going to be difficult to replace with block chain, but the popularity is picking up quickly and crypto may very well be the future.

Blockchain technology seems like the simple solution to almost all modern day financing problems. However it will lead to a cashless society which could end up being a negative thing. Governing bodies will always want their hand in it, I see government's building their own digital currencies instead of using decentralized currency. Ruining the whole idea of crypto.

The future of crypto is unknown, but the future of fiat was sealed once governments took notice of crypto.