If I were a billionaire, I would squander untold sums of money on all manner of things that many people would find stupid. I would buy anything that tickled my fancy, mostly cars though. I agree with some types of money squandering, but to drop nearly $800k on a bathtub is crazy.
An Italian company called Baldi has carved a three-person tub out of a solid piece of crystal rock. The tub was made for a window display at Harrods and can be yours for only $790,000. Scoff as I might, Baldi has already sold a similar tub.