Fear or FOMO has many things to offer you in trading. Most times you see a confirmation for your entry but not too sure, so you avoid taking the trade just to come back only to see that the market moves heavily in your direction. Again like you also said, when you get the courage to place an entry, unfortunately the market moves against you. Fear can either serve you or punish you. So we don't underestimate it while trading. But one thing I've come to learn in my years  of trading is that the moment you learn to over come fear and accept your losses, the market work 50% for you most of the time. Fear limits your trading potential and might also save you. Back then I remembered I using very small lot size to take my trades out of fear. When I realized that I wasn't moving at all, I started practicing with bigger lot size and accepted my loss when ever it comes.. that's trading and there's no way to win more than for you overcoming fear.