Elon Musk is now a trillionaire. Is his next big move a merger between Tesla and SpaceX into a $3 trillion behemoth?

Tesla investors are responding to rampant speculation about a mega-merger with SpaceX, which raised $86 billion in a blockbuster IPO last month.

Elon Musk is now a trillionaire. Is his next big move a merger between Tesla and SpaceX into a $3 trillion behemoth?