narcissistic arsehole
I've recently got suckered into a group that turned out to consider calling people "narcissistic" is an "ableist slur... because narcissism is a disability".
EM is still kind of a real life Tony Stark, the character is not exactly an altruistic philanthropist either.
On the bright sight, he also promised Saudi Arabia to build a Hyperloop, also for The Line city in Neom, that's turning out to be a great way to syphon SA's oil sales state fund.
But seriously, a Hyperloop would work best on Mars, where the pressure differential would be minimal, while a tube would keep the dust out. Elon's master plan is still to build a Mars colony with indentured servants under threat of no air. On the way, he's scamming whoever it takes, and getting any investment or benefit he can land.