I think they can't stop the usage of bitcoin. The only thing that will make it stop is when they propose a law regarding the usage of the bitcoin. But, as long as there is no KYC needed in the transaction that you are going to do, it might take them several months to distinguish who made the transaction. They will have a hard time trying to identify who is who.
Stopping Bitcoin is almost impossible not unless there is a total ban of crypto trading worldwide but as far as I know that is not happening yet. And I don't think it will ever going to happen in the future but of course, the government can do anything what they want to protect its people. Although Bitcoin is not the problem here that's why the government wants to ban crypto trading, it is the scammers.
The usage of cryptocurrency has gone beyond the limitation, this means governments didn't expected such a level of growth. Even now there were more restrictions to use bitcoin around the world, but people from those countries to still continue to use it. This is all about the decentralized functioning and the need for such an advancement. There will be people and authorities who oppose advancement, but this is unstoppable by anyone holding power.