No it isn't. This is incredibly polluting. Yachts are also very polluting. I am not sure what is worse. But there other much more socially valuable ways for bil

No it isn't. This is incredibly polluting. Yachts are also very polluting. I am not sure what is worse. But there other much more socially valuable ways for billionaires to spend money. Charity, building parks, funding research, giving out scholarships, are all ways of stocking rich peoples egos that are also beneficial to society. Even if you look at adrenaline pumping adventures, you can do helium balloons, sailing yachts, or submarine voyages to the deep ocean. These do not create much pollution.