Hopefully, we will get over with the fiat or paper money and convert it into paperless. Technology would take over the world and we will be using one cryptocurrency which is bitcoin that doesnt need any conversion in every country. 10 years is so long that even we can produce new model of phones every month. This can be happen soon.
Several countries are trying to encourage their population to leave paper money behind and only use debit and credit cards but that is a mistake, to begin with only the richest countries can do that so it is impossible for fiat in electronic form or cryptocurrencies to be used by everyone, so we will need a physical form of money for the foreseeable future, and second if the form of electronic money that is the most prevalent is still a form of fiat then you will lose all privacy since the governments and banks will know everything in which you spend your money, and finally you are overestimating the speed in which all of this can happen.