For those large-scale investors, the safest and most ideal approach is to wait for the black swan to pass, because I believe that big funds probably can't withstand the psychological shock of a 50% drop from 1900 to 900.

I am relatively aggressive with my own position allocation, firstly as a market indicator for opening trades, and secondly because I can withstand losses.
Making money in a bear market is much harder than in a bull market. Generally speaking, as long as the retail investors ensure they don't lose in the bear market, they have already outperformed 90% of people.