I think Bitcoin has crossed the border risk, and cant die, maybe will addapt to survive
But if Bitcoin DOES die, it will come from a fully operational quantum computer that is controlled by the banks or governments.
The only other thing that will kill Bitcoin is a massive disruption of the Internet. But this will take down the banking system, as well.
See:
https://bitcointalk.org/index.php?topic=460457.msg5084101#msg5084101.
