Its all so that he can tweet people are peados if they mock his ideas (submarine for example) without fear of being cancelled... Im sure longer term he envisages tesla solar and battery powered tunnels in mars filled with monkey (flying there on space X and being driven round in automated tesla moon cyber buggies) who have tweeting chips implanted in their brains so they link directly to starlink to pile on anybody who isnt a musk fanboy on twitter - it really is the only convergent strategy for all his businesses
He's basically a pantomime bond villain. - fair play to him for that though because if it was me I'd be dead from hookers and coke in no time with even 10% of his money