At what point is qqqm better than voo for young investors?

Anytime qqq is mentioned to have beaten voo the past 15-20 years people say “past performance does not guarantee future returns” but they use that same logic for VOO when they say its averaged 10 percent for many decades. If someone is young why not add in alot of qqq alongside with voo? After all, the companies are investing a shit ton of money in AI so why not jump on the train? The economy is no longer about mcdonalds and home depot its about tech and AI

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