the rich ones don't invest for sandwich lol they invest long term....and from here they don't see prices going up steady it's logical that crash is coming.
Im not sure about cryptocurrency it will acting different ways coz people getting out of real estate stock market and gold and even from bonds to buy crypto so poor guys who might need to sell their crypto for surviving will sell while the rich ones will buy their cryptocurrency so i see crypto will be not quite correlated with other assets.
crypto pretty much already considered as a hedge against inflation right now it's one of the safe haven despite the volatility but so far it's been steady growth, we can't really predict when crash might happen, but one thing for sure we can keep our wealth from plummeting.
I think there's no point in timing when the crash might happen, just keep your asset from getting too much exposure into anything that can crash so bad in the time of huge crash.