One thing is clear. Digital currencies are the future. Fiat money will always disappear more and more. And after that some digital currency will be available everyhwere. The question is just, which one? Something like paypal, or do we get a real cryptocurrency who will be controlled by the people? I really hope it will be a cryptocurrency. Because i dont want to support the banks anymore.
I'm not sure about Fiat money would disappear, For me its impossible to happen because not all the people are supporting cryptocurrencise and not all the people know the existence of it and I'm sure the government will not allow this to happen but I hope bitcoin and other crypto would recognize as one of the global currencies.