Earlier quoted context omitted.
A ban won't stop crypto any more than it stops illegal drugs, prostitution, etc. That said, there would be an effect on the crypto markets if a handful of major nations took action. So the question I have would be: will they aim for the taxes (presumably allowing crypto trading), or for an outright ban?
Sure, but unlike drugs or prostitution, aggressive police action doesn't harm any underprivileged classes, but rather a bunch of affluent tax evaders.
http://abcnews.go.com/Technology/wireStory/venezuelans-bitco...
edit: Rather than downvote - could you please explain why you think crypto is not beneficial to the billions of people worldwide currently excluded from the financial system?