For years, YouTube star Hank Green has stuck to the same straightforward investing wisdom touted by legends like Warren Buffett: Put your money in an S&P 500 index fund and leave it alone.

It’s advice that has paid off handsomely for millions of investors: this year alone, the index is up roughly some 16%, and averaged more than 20% in gains over the last three years and roughly 14.6% over the past two decades. In most cases, it’s easily beaten investors who try to pick individual stocks like Tesla or Meta.

But as Wall Street frets over a possible AI-driven bubble—with voices from “Big Short” investor Michael Burry to economist Mohamed El-Erian sounding alarms—Green isn’t waiting around to see what happens. He’s already rethinking how much of his own wealth is tied to Big Tech.

A major

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