There are downward corrections when investors sell off to take their profits.
The larger the number (22,000), the larger the adjustments.
Besides, the equities market is a crap shoot to begin with.
My wife an I took all of our money our of the stock market in 2008 when we lost half of our retirement savings before we got a statement in the mail telling us it had dropped.
Of course, by then it was too late.
Some people will bail out at the bottom which is the worst thing you can do. I had bailed during a crash in early 2000s when I was concerned I was getting laid off. That's when I learned one can never figure out the low and know when to get back into the market. I got back in at a higher price than the price I sold. Lesson learned.
During 2008 I stayed put and within 4 years or so I was back to where I was. The market did well during the Obama years contrary to conventional wisdom because of artificially low interest rates.
It is tough to navigate stuff like this. Best thing I learned is to leave it invested and leave it alone for 40 years and you get well rewarded and can comfortably retire.