Point A government's sets bitcoin bann not because they know what bitcoin is and what the bitcoin is, the government is told what it is bitcoin and so on but the government keeps claiming bitcoin as a threat to banking.
Point B government claims bitcoin as a tool to launder money.
Point C government see unstable prices
Just opinion
i dont really think unstable prices has anything to do with it, there's just no justification for a government to go off of to ban anything because of its volatility. I think at first, it could have been valid to make the point that the government did not have a good grasp of what bitcoin is, but it's not really the case anymore. at this point, any major government should be well aware of bitcoin, its uses, and its inner workings. going off of that, if there was to be a reason for a government to ban bitcoin in at this time, it would be because bitcoin poses an economical threat to that government. for example, a more authoritarian government might not like the idea of a decentralized currency being used by a majority of its people, because they cannot control it.