Tesla CEO Elon Musk's net worth crossed $400 billion on Thursday (December 12), the Forbes real-time billionaires list showed, boosted by a nearly 71% surge in the automaker's shares this year and the soaring valuation of his rocket company SpaceX. #elonmusk #musk #tesla Enjoy the best sports news on our website, with all the top stories and the latest updates on video: https://en.as.com/videos/?omnil=mpal