The past 27 years, many great companies emerged/revived, goog, amazon, apple, msft, netflix, nvda, tsla, meta. They are so visible that if you just buy and hold or stay fully invested in tech in 401k, those results are achieviable.
The psychological control of not selling is harder to play than picking the correct stock.
The question is: What are the next mega 3, 5, 7? OPENAI, ARM, PLTR?