Conflict of Interest?

Yup, the president sometimes uses offensive language. Yup, he does not always choose his words carefully.
However, he is really good at making money and self promoting. I think he is a populist who likes to be right and brag about his accomplishments.

I fully expect the US Stock Market to be used by the President to show proof of his ability to make money.
Shouldn't everyone, even those who don't agree with the president take advantage of his strength for making money and ride the boosting stock market, or does this indicate a conflict of interest?

What should those that aren't part of the President's base do?