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.
No,bitcoin will not be able to replace national currency because national currency was issued by the government while bitcoin or crypto is a digital currency. They are different types of currency with different uses. Digital can't use as fiat money or national currency because it is always needs access to internet everytime you make a transaction and not all the people all over the work know how to use it even a small gadget and those who are old enough they don't know how to use digital currency. They just familiar with fiat money and not digital. Aside from that not all countries accept cryptocurrency that's why it is impossible to happen that one day crypto or bitcoin will replace our national currency.