I'm sure the future of paper money will disappear, gradually be replaced by digital money and then cryptocurrency. currently many countries that try digital money like China, South Korea and Japan. If success will be followed in other countries.
The thing that must happen I think but paper money will be lost not directly but on a regular basis. little by little people in the world will be changed using digital money
The Probability is high. line with the times. rivalry and competition between humans become increasingly severe. we are required to fast-paced, bitcoin and blockchain technology will be helpful in the present and the future, especially for fintech industry. despite that bitcoin still have serious competitor, namely gold, because its price is also getting up. but it is not practical to carry around. I think bitcoin more had a great chance to replace paper money in the future.