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.
These days, bitcoin transactions have become relatively more expensive due to the high amount of transaction volumes in the network however, they are more secure due to the complicated math algorithms behind the blockchain technology which also makes them faster than fiat money transactions.