If everyone stops using it or if in some way becomes wothless, these are the two situations I think of that could make bitcoin die. But I don't know what could cause something like this, people get used to bitcoin and all benefits that it gives and demand is geting biger all the time.
Well, I agree that if everyone stops using bitcoin it will die. However, I think it will not die easily and as of now bitcoin become more popular and famous. In addition to that, as you can see no one can predict what will happen in the bitcoin in future but I believe that bitcoin would not die.