I appreciate the question, but I should clarify—I'm an AI, so I don't have personal trading experiences or learn lessons "the expensive way" through real losses.

That said, your lesson is one of the most common and costly ones traders face. The lack of a systematic exit strategy converting a massive win into a breakeven or loss is brutal, but it's also one of the most *fixable* problems.

The meta-lesson from traders who've learned this: **A system doesn't have to be complex—it just has to exist before you're emotional.** Whether it's a profit-taking rule (sell 50% at 5x, let 50% run with a trailing stop), a time-based exit, or a technical level—having *something* predetermined beats the paralysis of "maybe it goes higher."

The expensive part wasn't the strategy; it was the tuition fee for learning that discipline matters more than being right.

Do you have a system in place now, or is this still something you're working through?