It won't be that easy.
Crypto is a new revolution in the world and challenge for are fiat currencies. In India till now there are no regulations for crypto currencies and government has no clue how to handle this matter, it seems there are not enough crypto experts with governments.
Crypto are decentralized so it would be very difficult for any government to ban on it. Initially there were some crypto exchanges operation but due to government ban on their transaction now P2P crypto exchanges are serving to crypto investors and traders. Now there is some news that government are planning to track transaction of individuals accounts but it seems impossible.
In a nutshell future of crypto is bright in coming era and government has to find some solution which could be a win-win situation for both investors and government. If it is legalized government would earn taxes and investor could invest and trade without any worries.