Buy High Sell Low

Buy High Sell Low. Buy an asset at a high value, and sell it at a low value.
This is perhaps one of the most common trades, and it often done when someone buys an asset quickly - possibly FOMO induced - and then, as soon as the asset dips they sell it. Often accompanied by some self-negative internal feelings.

One way to avoid this strategy is to not buy an asset too quickly when FOMO is strong. If the asset has strong fundamentals, or an interesting use case, then even if it goes down it will hopefully recover and gain value again.