Many Under 30 alumni have gone on to become tech titans, CEOs, and even billionaires. A few have turned out to be duds, or far worse. Below, from SBF to Martin

Many Under 30 alumni have gone on to become tech titans, CEOs, and even billionaires. A few have turned out to be duds, or far worse. Below, from SBF to Martin Shkreli: the Under 30 picks we wish we could take back.