Should I sell my US stocks if I feel the market will crash again?

Yes it's hard to predict when is the high or low but if you feel that its crashing again.

Do think about taking your initial investment out and let your profit run and enter when you think it's right time.

At least the Market goes up your profit will go higher or vice versa.

This will make you feel better at least your capital is back.

Hope this help.

If you feel that the stock market is about to crash, based on that "feeling" you shouldn't sell your stocks. You do not want to be timing the markets, as the S&P500 will always go up in the long run. You also also bear commission fees if you sell your stocks. I will recommend you this instead: if the market goes up, good for you. If you market were to crash, load up on stocks where you think the company has good fundamentals and have the potential to grow even more in the future.