“I’ve got a very tall son named Barron. Has anyone ever heard of him?” Donald Trump asked jokingly at an inauguration event in January. The president’s six-foot-eight-or-so youngest son, who rarely makes public appearances, stood up and waved to the crowd. “He said, ‘Dad, you’ve gotta go out and do Joe Rogan,’” Trump bragged, crediting Barron’s insights with helping win more young voters.

He also gives his 19-year-old credit for showing him a thing or two about crypto, the source of the president’s quickly expanding fortune. Barron, who taught his dad what a “wallet” is, cofounded World Liberty Financial, a cryptocurrency company, with his father and older brothers last year, less than two months before the 2024 election. Most financial advisors wouldn’t advise getting your parents into crypto, but most parents aren’t about to be elected president—and when Dad won, World Liberty exploded. Forbes estimates that it’s added

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