I think that more and more countries are banned from selling or investing in bitcoin or cryptocurrency because they fear that letting their bitcoin grow so strong in their country will have a direct impact on their economies.
If that is the case, then those countries sure are very proactive. The number of bitcoin users in our world is so little that it's just a fraction more than 0%. On the other hand, I don't think it's the main reason why they are banning cryptocurrency in their country.
I think they are banning bitcoin and ICOs to prevent their people from losing money from investing. ICOs are mostly scams these days and bitcoin is very volatile. Those people's monetary loss are the country's loss too. They don't want people going bankrupt because they are gullible and got scammed by ICOs or got greedy in holding bitcoin that they held on to it too much that when they needed money, they had to sell at a low price.