Accepting both cash and crypto, the One Hyde Park Penthouse sets a new stand for luxury in one of London's most luxurious neighborhoods. The 18,000 square foot duplex is the crowning jewel of the Residences at the Mandarin Oriental and the brainchild of the CPC Group and Waterknights. Upon arrival, its two-story reception room gives guests an impressive welcome with a custom two-way fireplace and floor-to-ceiling windows that wrap the space in views of Hyde Park. Of the five bedrooms, the main suite features dual dressing rooms and bathrooms fully lined in marble, while a Japanse-inspired kitchen with a 750-bottle wine room, private spa with sauna and steam room, fitness studio, and two outdoor terraces make up the rest of the condo. Purchase also includes four parking spaces, four storage units, and access to the Mandarin Oriental's concierge team. Primed to be London's most expensive penthouse, it can be yours for just 4,300 Bitcoins.