With the deletion of fiat everyone is going to be fat.

Software. Everything will just be a click away or a scan away.
No need to walk for minutes or queue in a bank just to wait for your turn.
Have been doing this for quite a while now and I can say I am getting fat.
Just need my internet and my computer or smartphone.
Banks will stay though. It cannot be just taken away in just a manner of time. Also, they are upgrading their own technology and even adopting the blockchain technology.
Just one problem though, they are centralized. It is their own and not for the people or freedom unlike BTC.