All of a sudden, Elon Musk had moved into the realm of politics, headlining rallies, steering government appointments, shaping the agenda for the next President of the United States. For more than three years he’s been one of the world’s richest and most powerful men.

Elon Musk, as a businessman, is primarily known for three of his many enterprises. One is X, formerly Twitter, nowadays judged by investment giant Fidelity to be worth perhaps a quarter of what it cost him.