This is very possible. The Blockchain technology is a revolutionary one with a lot of significance. As the people become more familiar with it, the adoption and utilization of the Blockchain and cryptocurrency will increase which will gradually lead the world to cashless.
Yes it is possible! The current payment system is now becoming digital. People are now prefer to use digital currencies than fiat currencies. They are aware that they will have a lot of opportunities by using and having cryptocurrencies.
All jobs now almost use technology and all have internet connections so in the future all transactions will run using the internet network and maybe the paper money is not so efficient anymore.