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.
In my opinion, national currency is a material that follows with the every livelihoods of a country. But cryptocurrency is a multimedia that is only can control by those who actually knows its value. National currency can be controlled by the bank or government but they cannot control cryptocurrency.