I disagree.
In fact, the 50-year-old Musk has coldly calculated that within the failure rate of the one-way Mars missions -- that he would like to begin in 5 years -- that he will not be leaving until he has a colony in size that reaches the exact tipping point to regard an arriving 70-something-year-old Musk as the 'George Washington of Mars'.
He has intensely studied the group dynamics that detail how he can send x number of astronauts who will not attempt to usurp his empty throne and follow chain-of-command, until finally he has a 'rogue' pretender on Mars proper, and after that person is removed, Musk will surely have to leave on the next tender to fill the void, the rogue having wakened émigrés to the idea of a potentate, or lack thereof.
No one, NO ONE who has invested this much time and effort and money has a 'death wish'. Perhaps megalomania, but not a 'death wish'. Anyone who has cravely calculated that he can leave in 2040, with his Earth career mostly completed, if he survives the trip, probably has a useful 5-year run as "Governor of New Mars". That is a sane presumption, just as previous conquerors in Western Civilization have held, no less so than Eriksson or Columbus.
What will likely do in Musk is the same thing that will empoverish or worse many of us - the US economy destroyed and the USD made worthless by the endless spending and taxation of the Biden Junta.