I have been seeing the progress of cryptocurrency these past few years, and I've been thinking, will it definitely be a replacement for physical money and use crypto as a primary transactions in our everyday life?
Do we hope to live in a nation without borders some day? Or
Have some global system of governance?
If the answers to these are "NO", then there isn't any chance that we would have bitcoin or any other cryptocurrency out there to replace fiat. Fiat is very much government product and a very vital tool to centralisation as some way go ensure they maintain some control over its citizens.
Besides, bitcoin has got some downsides to it of which, fiat very much compliments or perhaps I should say fiat came into existence before bitcoin so yeah. There are times when you don't just have any need for digitalism and that's where hard currencies come in. Fiat and bitcoin working together is our best bet for the future.