it's really huge problem who dont know the trading or panic sellers making the very fast and they think they will lose all money all capitals when the market crash / red and than yes you must to sell it but this is not good trading system
Your emotion will lead you either to make profit or to make you loss. Its clearly state that buying at a higher price and selling it at a low is a reaction of people who are on panic, well I hope that you learn from that experience and do better next time. Buy low and Sell high this is the easiest strategy on trading you just need to understand.
Agreed, if your emotion leads you into panic situation because the value drops rapidly well for sure in the end you will loss of money. But if we control our emotion even it drops the price value we keep stand still and remain calm and wait for the value increase well it will be done for sure.