The only way for Bitcoin to lose now is by being overtaken by another cryptocurrency. So, the question now is, what do you think the odds are of Bitcoin failing (let's say going to a market cap <100 Million).
Well that is very unlikely to happen. Also I don't want to be losing 99% of my wealth so I would jump out first, much before.
This jumping out, if it for some reason gains traction, could make the air (market cap) go from one balloon to another really fast.
Nobody can be complacent.