"Quiet luxury" is a lifestyle for the reclusive rich. : It's a rare day that passes without a headline about Elon Musk, Mark Zuckerberg, Jeff Bezos, or any number of the other flashy and seemingly press-loving billionaires. The rumored cage fight between Musk and Zuckerberg has become a melee for media attention, and Jeff Bezos can regularly be spotted on his $500 million yacht with his fiancée, Lauren Sánchez. But some others in the billionaire class are the opposite, taking great care to stay out of the limelight.