The stock market has been nuts for quite a while now.
A fart in the wrong place can send the market gyrating all over the place.
If I were in my 30s and had a lot of stock, I'd probably hold it, but it wouldn't be all of my portfolio. If you're in your 60s, I'd be diversifying away from large percentages of stock. Now's a good time with the market at a pinnacle. I held all my stock clear through the crash, and didn't sell anything until it was above the 14,000 mark. Didn't lose a nickel.
The trick is not to panic when everyone else is.
Only an idiot of any age would be buying large amounts of stock right now.