bitcoin and a number of other digital currencies will one day replace the position of banknotes as a medium of exchange. The reason is that this currency can correct problems that exist in paper currency, and indeed in history, the same thing always happens to new currencies that replace old currencies.
but how do you think

I also think that cryptocurrencies will replace banknotes sooner or later. Because the banknote itself is the biggest bubble in the world, and comparing the cryptocurrency with the banknotes, we will find that many of the attributes of encryption are completely beyond the banknotes. This is the currency of future human needs.