yes, they can stop bitcoin through the regulations they make. you can see several countries that have made regulations limiting the use of bitcoin in their country, such as bangladesh, where their citizens cannot use bitcoin freely because the government has banned bitcoin. from this a government can limit the use of bitcoin whenever they want and citizens cannot fight this because it is the jurisdiction of the government to be able to secure their economy on the grounds that bitcoin could disrupt the circulation of their currency.
when you check the history of Bitcoin you can see that government don't have anything to do with bitcoin blockage because they don't know exactly the technology of bitcoin because if they have known the technology of bitcoin by now they would have abolish the existence of bitcoin, on my own I know very well that bitcoin have what it takes to remain on earth and only thing government can do government can do to bitcoin is to regulate its power rate in that particular country.