Just weeks after publicly questioning whether Twitter holds up free speech, Elon Musk has dropped nearly $3 billion to become its largest stakeholder. The Tesla CEO has purchased a 9.2% stake in the social media company, more than quadruple the position of Twitter founder Jack Dorsey, according to the Securities and Exchange Commission 13G filing released Monday. Based on Twitter’s closing price Friday, Musk’s newly acquired 73,486,938 shares are worth $2.89 billion. The 50-year-old entrepreneur hasn’t publicly commented on his purchase, but it comes as he has seemingly grown more upset with h…