All yacht owners are ‘rich’, but some are richer than others.
For example, when a wealthy person is able to purchase a US$ 10 million yacht. His net worth is probably between US$ 50 million and US$ 100 million. Similar, when you are able to purchase a US$ 50 million yacht. Your net worth will probably be a few hundred million dollar.
Only the world’s billionaires are able to purchase yachts larger than 80 met. Which will cost more than US$ 100 million. Some billionaires, like the late Paul Allen, even owned more than one superyacht.
We have excluded Heads of States, Kings, Emirs, and other Royalty. As actually the Al Nahyan Family, Rulers or Abu Dhabi, are the world’s richest yacht owners. They also own the most yachts: Abu Al Abyad, Azzam, Dhafir, Maryah, Moonlight II, Rabdan, Topaz, Yas, and probably a few more we have not yet discovered.)