Although I agree that the future of paper money is going away and will be completely replaced by digital money or cryptocurrency, I believe that this process will not happen anytime soon. The world is developing very fast but that doesn't mean everyone can use digital devices. There are still limitations to completely eliminating paper money from our world. For example, in my family, my parents are both elderly and even they have difficulty using smartphones. How can they use online payment tools, let alone cryptocurrencies? What about people with disabilities?...there are a lot of problems and I think it's very difficult to get rid of paper money.