18. Bill Gates – Serene – est. $2 million p/w
Bill Gates, the co-founder of Microsoft will always be remembered as one of the richest people on Earth. He was on a trip with his family on the 440-foot luxury yacht Serene, and that was “only” $2 million per week. The boat comes with an indoor and outdoor Jacuzzi, a swimming pool on the sundeck, two helipads, a gym and a cinema, to name a few features.