Elon Musk took SpaceX public in June. TIMOTHY A. CLARY / AFP via Getty Images Elon Musk says thousands of SpaceX employees are probably millionaires after its blockbuster IPO. Musk said he gave stock to workers to incentivize them and give them a stake in SpaceX's success. The Tesla and SpaceX CEO hopes to send thousands of people to the moon and Mars before 2040. Elon Musk says SpaceX's blockbuster valuation has likely turned thousands of his employees into millionaires. During a Wednesday in