Nothing will kill Bitcoin, just like nothing killed beanie babies. They both will exist for a long time.

But the world is finite, there is a limited number of people who have a limited amount of money with to speculate. Maybe the Bitcoin pumpers will convince some of that money to move away from other speculative investments and into Bitcoin and the price will go up, but there is a limit that will be hit eventually, then you have to deal with the reality of a negative cashflow asset.