Paper money will continue to be in circulation but it physical use will be heavily limited in the future as it's more less costly to use technology in financial transactions than always counting paper money. Seems that Central Banks Digital Currencies won't be very well accepted like what happened in Nigeria when a vast population of the youth rejected it and went for crypto instead.
Paper money will certainly continue to be used because the state has many interests, especially cryptocurrencies today more and more weaknesses, it is true that cryptocurrencies are not instant solutions to overcome various problems, but I think as an alternative and jagnan has made it as the main asset because the shaking in the market will continue occur.