if all the governments of all the world joint hands together to banned bitcoins ,then only would bitcoin can come to an end.otherwise it is not gonna happen no where soon. because of its decentralization and no technology could beat because it is the first of its kind.
I think it still will not make bitcoin die dude. bitcoin for decentralization and is in the internet even though the government banned bitcoin. but the government will not be able to withstand the user not to use bitcoin