If the world continues to develop and there are no disasters like World War 3, the technologies will still be preserved and developed, I don't think there's any reason for us to go back to the barter method. We're moving towards convenience, eliminating bulky stuff, so there's no reason to return to the previous methods. I am not saying that paper money will be phased out any time soon but certainly in the future, CBDC will be the first experimental step to get rid of paper money.
At present or in the next ten years, banknotes will still be in circulation, a lot of effort must be made to eliminate the circulation of paper money, while the resources needed have not been fully met, the generation of people over 40 to 50 years it is too complicated to understand technology, so the potential to get rid of the swirl of banknotes is almost impossible. What's more, there are still quite a number of countries that have special agreements on fiat currency, so efforts to eliminate them require new regulations that are so complicated.
While the government also did not try to develop technology that would reduce the circulation of paper money, on the contrary the CBDC introduced by the Bank was a government product whose function was only to restrain the rate of growth of crypto and these efforts were not successful