Losses are part of trading. Even professional traders have losing trades. The goal is not to win every time, but to make more on wins than you lose on losses.
Many traders buy after a big pump because of FOMO. Most of the time, price drops after that. It is better to wait for a good entry than to chase a fast move.
Fear and greed are the biggest enemies of traders. Fear makes you sell early, greed makes you hold too long. Good traders follow their plan, not their emotions.