I found this expression on the news channel about the crypto currency: "Anyone who will try to buy coffee for cash in 2023, runs the risk of causing laughter from the seller, that he does not use crypto currency."
how do you think, is it realistic? Can a crypto currency replace national money?
I think that it's possible, but it will take more time.
Fiat monet and cryptocurrency are differ to each other, which means that these two thing has different usage and different advantages to each other, just like bitcoin, it is used in Internet or in virtual world while cash like dollars is usually used in real world to buy and pay bills but also bitcoin can do it too.