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What it's really like to work for a billionaire

Find out what it's like to work for Elon Musk, Mark Zuckerberg, Oprah Winfrey, and more of the world's highest flyers.

We asked 2 partners at Goldman Sachs what keeps them up at night. They had the same answer.

The firm's head of private wealth management and corporate engagement separately said they focus on their colleagues' ...