A friend of mine who is taking monoclonal antibodies can't eat or sleep well every day. He asked me what to do?

I think any advice I give now is meaningless to him because he won't listen to me. Just like a person who never wears a seat belt while driving, he won't listen to others' advice. Once something goes wrong, he will realize the problem itself. People can't teach people, but things can teach people once.

The first lesson of investment is the risk lesson. Our trading itself is a risk. If we keep the risk in mind, profits will accompany us.