At the moment, I don't think a ban on crypts or bitcoin is going to be total (if at all it will come ) , this is because bitcoin is decentralized and distinct countries have started looking for accepting it because it would assist there economy when they invest on it.
Yes there are many countries planning for blockchain technology and their own crypto currency and the first one to officially announce that is Venezuela as their government is planning for crypto named "Petro" and once this will be successfully implemented i believe other countries who are looking to recover heir economy and get rid of debt will adopt same. All they need is more awareness and showcasing the benefit of crypto coin for both the normal civilians and the government as well.
I agree that many countries are trying to experiment to bring their fiat into crypto and run with that. I also agree that it would get a lukewarm reception from the community at large and only newbies and uninformed would buy into it. Though I was unaware that Venezuela was planning on putting theirs out so soon. I don't see that taking off as quickly as they think, if not fall flat on their face since the Bolivar is worth less than WoW gold. I know Canada tried to get their currency on crypto a while back and it failed miserably. Something that I've been keeping my eye on and something that governments would want to keep their eye on would be cities putting out their own crypto. That could be a long way off, or not. But if that happened cities would/could gain considerable power over the state since some major cities of the world have an economy rivaling some countries.