I don't know what is up with India and Pakistan. Be it any form of currency, it brings revenue and people start investing in it. And investment is a personal choice. If government or banks think that it is illegal, why not authenticate all the cryptocurrencies and then give an official approval?
Mate, is not that easy to give such approval. We have virtually have no government that I know of that has given such approval yet. I don't know how far it is with Japan though.