I believe that a good investor/trader has the ability to deal with any kind of situation arising in the market. However, not investing and trading is a wise idea if the situation is out of his control and understanding. If someone is willing to take a risk by trading out of his comfort zone then he should be ready to deal with the consequences arising out of such decision. However, never blindly follow others opinion because they don't have the complete picture and understanding of your skills, knowledge, experience and understanding.