The "History Supreme" is an alleged superyacht, famously reported to be the world's most expensive due to its lavish additions like a meteorite and fossil-clad wall and the extensive use of solid gold and platinum. Its rumored price tag is an astonishing $4.8 billion, a figure widely debated among experts and enthusiasts. There are no confirmed sales or even definitive public proof of its actual existence, making it more of a legend than a verified acquisition.