I think the government can only ban bitcoin adopters in their country but they can't stop bitcoin because bitcoin is a virtual currency that runs on its own with the internet network, so this is of course impossible for the government because the only way that can stop the circulation of bitcoin they have to close the entire internet network in every country.
Of course, they can't control people's action outside their jurisdiction, even on their own country, there are still people who will still use bitcoin/crypto regardless the acceptance/law against crypto of the government.