Bitcoin cannot die.  It is decentralized and trustless.  How useful bitcoin is will determine its value and how widely adopted it becomes, but all of the constant hand-wringing about bitcoin dying is sole because bitcoin is fundamentally a disruptive innovation.  It takes a bunch of new concepts and complex technologies and mixes them all together into something that nobody expected, understands or can predict what will happen with next.  So we may have no idea just how important bitcoin will become, but it certainly isn't going to "die."