So if you trade by emotions you will very likely loose money on the longterm. Therefore you should try to stick to your strategy and use as much technical tools for chart analysis to avoid trades lead by emotions
Traders who are extremely emotional do not apply TA at all before buying a coin. If for example you analyze properly, you should know where to set your stop limit (stop loss) and sell order. What I normally do is, after buying a coin, I set sell order and SL using OCO incase the market goes south.