SpaceX debuted on the US stock market with a $2 trillion valuation, officially making Elon Musk the world's first trillionaire.Shares surged significantly on the opening day as retail demand spiked, leading to trading outages at major investment firms.The firm recently integrated the artificial intelligence venture X.AI and the social media platform X to consolidate its market power.While the company secures massive capital for its Mars and artificial intelligence goals, analysts warn that the current stock price is high.