This is a serious discussion. I mean, after I've seen how bitcoin (and other cryptos as well) got dumped badly after an irrelevant law that makes ICOs illegal. I can only imagine now what would happen If more countries do the same thing and It could get worst by make itself bitcoin illegal. Whether we like to admit it or not, most of people would sell everything they have once its made illegal, some may continue to fight the central banking but the sad reality is that as soon as people start making profits, they will dump it and move on.
the government in my country is planning to generate income from bitcoin instead of stopping it. they are trying to find a local name for bitcoin to enter the literature. and then they plan to buy tax on bitcoin. I hope they will not succeed in this.