
Well, you would understand how some of us want things to happen when we feel like it is the right time. I, however, agree with your own assumption, paper money will naturally fade out once people get used to using digital transactions I however still believe that this will still predominantly be within the Urban settlers because, in my region, it will be difficult to conform people living in rural communities to give up using paper monies because these people are still heavily unbanked and are still only used to that form of transaction.
People who still live in rural areas or who live in inland areas are still very many traditional traders who are generally still very happy to use paper money because they are limited there by the lack of qualified infrastructure and technology to make transactions via digital.
So, in my opinion, this still really depends on the environment or certain places that already have more services for digital transactions. Because in underdeveloped countries, the use of digital transactions is clearly still very small, so that most of the people still have to use paper money.