24. Andrey Melnichenko’s A
With a net worth of over $8 billion, this Russian billionaire and founder of MDM Bank purchased the A – a 468-foot megayacht – in May 2017 for a whopping $300 million. Like Abramovich, Melnichenko had his yacht equipped with a missile defense system. He went further to add on bomb-proof windows and 44 cameras that keep a close eye on everything and everyone aboard the yacht. The master bedroom has a rotating king size bed which allows him to enjoy a 360° view without getting up.