By Luc Olinga The billionaire has become the largest shareholder of the micro-blogging website. Elon Musk has ended some of the speculation surrounding his surprise Twitter (TWTR) – Get Twitter, Inc. Report investment. On Monday, the chief executive officer of Tesla (TSLA) – Get Tesla Inc Report announced that he had a 9.2% stake in Twitter. But what has surprised the business community is that the billionaire chose a 13G form. That, according to the rules of the Securities and Exchange Commission (SEC), indicated that Musk would be a passive investor despite also being Twitter’s largest share…