Elon Musk Becomes World’s First $500 Billion Man — Briefly Elon Musk, the billionaire behind Tesla and SpaceX, has become the first person in history to briefly cross the $500 billion net worth mark, according to Forbes’ Real-Time Billionaires tracker. The 54-year-old’s wealth touched $500.1 billion on Wednesday before slipping slightly to $499.1 billion, fueled […]