Paper money absolutely has no future.
How can you say that, you can use it everyday. Paper money is similar to our food because you can't live without food and you can't survive for long without money. Because of money you can buy all you want even your health you can't go to clinic if you don't have money. All the things we use in our lives have monetary value, whether it is direct or indirect. That's why paper have future.
I think it is very difficult to replace paper money, because almost 100% of people in the world, using paper money as a means of transaction. it's because its use is very easy and practical. of course this will continue to be used until in the future.