Crypto currencies are comparatively cheaper, practical and efficient because they don't involve banks in making transactions so there are no taxes imposed here, but I don't think we can completely abandon the paper because in everyday life we cannot fully use crypto resources. because there are still many payments that can only be made using paper money
It's easy and transparent, yet adoption is not that wide as paper money offers, it will have long way before crypto will be able to be too useful in every means of transactions.
One thing a lot of people usually find a lot hard to blend in with is change and we have seen it quite some number of time and most especially when it comes to less developed countries. However, with the way things are going, I believe cryptocurrency is gradually filling some of the spots and really helping in a way that paper currency can never be able to help and most especially not just paper currency but the fiat system at large.
It is obvious to a lot of us that cryptocurrency is a whole lot useful and when we really want to look at the history of paper currency and now, we all know it has always been the biggest scam of all, just that the government are always so good at covering it up since transparency is not even a thing anyway.