On an episode of “Moonshots with Peter Diamandis” released earlier this year, Elon Musk dropped a statement so chilling, it stopped Glenn Beck in his tracks. “Well, one, like, side recommendation I have is, like, don’t worry about, like, squirreling money away for retirement in, like, 10 or 20 years. It won’t matter. … If any of the things that we’ve said are true, saving for retirement will be irrelevant,” the tech titan said.