They've plainly stated they want to regulate crypto currency, that is a step towards a ban. If they view crypto to be a threat (which any common sense government does), then they begin regulating the currency through convoluted tax law which makes no one want to use the currency.
If your left with high taxed crypto or traditional currency, no one will bother using crypto. And India has a poverty problem regardless, so there isn't any incentive for adoption. Adding in whatever regulations they can come up with will squash any crypto growth in India. Any crypto user should be against the regulation of crypto, it's one step before an outright ban.
That is a scenario that could come to happen, however governments are taking a risk as it is always possible that their regulations are ignored by the population.
So in the case the demand of bitcoin was high and the government passed a law to try to control this and diminish the interest of the population in bitcoin, the population may simply decide to ignore the law and deal with bitcoin as if there was no regulation in place, now for this to happen the demand and the interest in bitcoin will need to be very high, but I think we are slowly moving towards that direction, and when that happens no amount of regulation will be enough to stop people to adopt bitcoin.