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.
Can a crypto currency replace national money? Yes, why not? But I highly doubt that someone will laugh at you in 2023, it would be too early, I would say maybe 2030, that would be more realistic to me.