Even if people like it or not, only having cryptocurrencies instead of fiat would sadly never work in real life. I dont really understand the point either, each of them have its perks (Fiat/Crypto). Specially in the case of fiat cash which does not need the internet.
What would happen in the future if your country enters a war and you have no access to internet? You are doomed. I think having both is a great advantage!
I'd like to think that when you stand for something positive, you'd like to only dwell on the positive impact which is glaringly obvious. The sad truth is that there would be side effects.
Presently in my own case, living just as it is now is entirely due to crypto through my activity on hive. We are mostly blinded by one side which is the right path that we miss out on an element that would compliment of propel our adventure.
Internet and real life are too completely separate places that can't be seperated from one another which is quite funny.
Our activity in real life makes the internet active.