In countries where crypto is "banned" (illegal for mainstream use), do you think people will still use it? In such an scenario, it's possible on-chain criminal activity (mainly money laundering, terrorist financing, etc) will rise. To prevent detection, it's likely both criminals and average people will use a privacy-oriented coin such as Monero or Zcash. Bitcoin will be the least used cryptocurrency due to its transparent design. But I could be wrong.
What do you think? Will people still use crypto in a country where it's prohibited to do so? Or will they be afraid? What if all of the world's countries turn against crypto (which is very unlikely atm)? Will market prices go all the way to $0?
Your input will be greatly appreciated. Thanks in advance.

Some people would, companies and legit investors wouldn't. Because if it would literally be illegal, why would multi million dollar investment companies take risks by investing illegally?
If it would be just freedom and money they would be interested about, they might as well be investing to buying and selling illegal drugs then, because those are worth money too. They usually don't, because there are severe repercussions for breaking the law. And those risk / reward benefits are not worth destroying companies.
And while some people would use them, without institutional investors, we might be looking at year 2013 prices.