The US market is very expensive, and as markets become more expensive, they become more vulnerable to outside shocks. Even if there is no crash, the potential for American shares is extremely limited.What has driven the index is a narrow group of stocks -the FANG stocks and also the semi-conductor stocks -but the typical stocks haven't performed particularly well.
I recommend a diversified portfolio of assets consisting of real estate, stocks, bonds and precious metals.With the equity portion.