Obvious much?
He's got beeelions of dollars[1].
He's a tycoon of industry (auto manufacturing).
He's got his own spaceships.
He's even called Elon Musk FFS! Come on, let's face it; If you were reading a book and it had a billionaire tycoon character called "Elon Musk" in it, you'd be pretty bloody sure you'd worked out who it was behind the plot to take over the world using humungous space-based laser weapons.
You just know there's an island sporting fetching volcanic secret base accessories somewhere in his property portfolio.
[1] The maniacal laugh is implicit in that.