What was your best investment/swing trade of the last 5 years? Was it DD or luck?

Curious to see in hindsight if people have made any well researched, successful plays they’d like to share. What was the thesis behind your conviction and how did you play it; how did you capitalise on a catalyst or market overreaction? Was it really due diligence or did you just get lucky off of a headline or macro? Edit: this is not an invitation to drop tickers or flex gains, the point is to get to the heart of successful trades/investments, from thesis to gameplan execution. Bonus: what was your worst investment/trade and what went wrong? What did you learn?