I would assume they'll sell at some point; they're not stupid people by any means, and investors usually take their profits eventually--and MAN, did they ever profit! Bitcoin isn't listed in any financial columns in newspapers (yet), but I'm assuming it's outperformed every other asset and even index of assets for the past 2 years at least. It's definitely beat precious metals and the S&P 500. But yeah, if they sell all at once, which I don't believe they're dumb enough to do unless there comes some bitcoin-destroying news, the market will crash. No one is stupid to sell everything all at once and crash all their profit, too. That would be crazy, and they have evinced no form of insanity yet.