Some reasons people might coach or provide some trading-related services.. Trading/investing is risky, time-consuming and requires quite a diverse implementation in order to become consistent. Some people might be suited to sell their product or services. For them, it's actually less stress, less risk and more certain outcomes. For others, having a steady job may provide the necessary stability. Many think about trading as in binary outcomes: Either you blow up, or you become billionaire. The truth is usually in between those results. A very small handful of people might do OK going all-in daytrading, but then you are really forcing such binary outcomes. Statistically to one's own detriment.