I have no opinion about Musk or Trump. I just want to give counter-examples to your claims: Saddam Hussain, Mussoloni, Ceausescu. At the peak of their power, they all seemed untouchable. Would they even have thought, when they were ruling their countries, that one day their fortunes would turn?
Quoting Gandhi: "There have been tyrants and murderers, and for a time, they can seem invincible, but in the end, they always fall. Always."
I think if we look around the world we can find plenty of counterexamples to Ganhi's quote.
Sure, they always "fall" in the sense that they're not immortal and they'll eventually die, but it's often (usually?) the case that a family member or some sort of protege steps up to fill their shoes.
The first counteraxample that comes to mid is Idi Amin, the Ugandan dictator. He murdered, pillaged and lived out the rest of his years (happily and luxuriously) in Saudi Arabia.
Quoting Gandhi: "There have been tyrants and murderers, and for a time, they can seem invincible, but in the end, they always fall. Always."