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 the near future, the use of cryptocurrencies to purchase stuffs will become rampant among many developing countries but I don't think it will completely displace these nations original currencies.