Passive investors will just ride it out. The only alternatives are to stay out of the market completely and permanently or to try market timing. Here is the wisdom on the latter: Taylor Larimore's market timing quotes
https://www.bogleheads.org/wiki/Taylor_Larimore's_market_timing_quotes
Probably true. In my case I call it "nonsense" because that is the conclusion from decades of academic research. I think we were all told this in pilot training: "You'd better learn from the mistakes of others because you won't live long enough to make them all yourself." People have been trying to beat markets for centuries, maybe millennia, so there is a rich literature to learn from. The problems arise when we succumb to our human biases to consider ourselves to be exceptional and lucky. That is why 80% of drivers (probably pilots, too) evaluate their driving skills to be above average. Another problem arises that the random nature of the markets regularly creates winners, who then conclude that they are genius investors. Nassim Taleb's book "
Fooled by Randomness" deals with this and is worthwhile reading for any serious investor.