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.
The world gone cashless 
, well it is hard to do but it is possible with blockchain technology because you can put a certain amount digitally and you can use it on your own transactions like those papers and coins valued as money though papers are quite equal to its value