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.
Even they will do this so, still bitcoin people will keep on doing transactions again and again. The only situation that bitcoin will possibly die is there are no more potential investors that has interest on investing with it. And when that happens then the whole bitcoin economy will be dead very soon because of no incoming transactions and as well interest.
It is not possible that bit coin will die, reason is there are more users joining daily, it is decentralized currency, everybody knows what the profit it gives, the technology it is uses hardly possible to end the bit coin. I disagree with the fact that bitcoin economy will be dead i mean how it is possible when the something is reaching to the highest peak will be dead and more users are trusting it.