Bitcoin will exist as long as there's one or at least few computers running a bitcoin full node. What could possibly stop this? Probably a global blackout or a huge EMP(electromagnetic pulse)[1] or something.
[1]
https://en.wikipedia.org/wiki/Electromagnetic_pulseAnd also if no one want to use bitcoin. When the demand was getting low then the price was too cheap and too many bad news coming, the bitcoin must getting closer to the death
I think everyday bitcoin was growth. Knowledge by bitcoin cannot be remove from the storage of our mind so everyday more person would do anything to earn bitcoin as thet can.
Bitcoin was not easily to died because it has two many components and it is the mother of all kind of coins.