Of course, you are smart! Hui-Shin Wong's husband-to-be is a white man, he could be a King and herself could be a Queen, yet, she has been telling her audience for many times, they are not the richest!

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Rank	Name	Title	Residence	Net worth	Source of wealth
1	Vajiralongkorn	King of Thailand	Thailand	$43 billion[1] — $30 billion[2]	Investments derived from the Crown Property Bureau.
2	Hassanal Bolkiah	Sultan of Brunei	Brunei	$28 billion[1] — $20 billion[2]	Profits from oil and gas industry.
3	Salman of Saudi Arabia	King of Saudi Arabia	Saudi Arabia	$18 billion[1][2]	Profits from oil industry.
4	Khalifa bin Zayed Al Nahyan	President of the United Arab Emirates Emir of Abu Dhabi	United Arab Emirates	$15.0 billion[1][2]	Investments from the Abu Dhabi Investment Authority.
5	Mohammed VI	King of Morocco	Morocco	$8.2 billion[1] — $2.1 billion[2]	Investments in SNI and Siger Holdings.
6	Hans-Adam II	Prince of Liechtenstein	Liechtenstein	$7.2 billion[1] — $3.5 billion[2]	Holdings in the Prince of Liechtenstein Foundation.
7	Mohammed bin Rashid Al Maktoum	Prime Minister of the United Arab Emirates Emir Sheikh of Dubai	United Arab Emirates	$4 billion[1][2]	Majority share of Dubai Holding and investments from the Abu Dhabi Investment Authority.
8	Henri, Grand Duke of Luxembourg	Grand Duke of Luxembourg	Luxembourg	$4 billion[1][2]
9	Juan Carlos I	King of Spain (abdicated in 2014)	Spain	$2.3 billion — $2 billion[3][4]	Oil,[5][6] enterprise and real estate. Current controversy over the money hidden in offshore banks and the $100 million received from Saudi Arabia.[7]
10	Tamim bin Hamad Al Thani	Emir of Qatar	Qatar	$2.1 billion[1] — $1.2 billion[2]	From various enterprises.
11	Albert II	Prince of Monaco	Monaco	$1.0 billion[1][2]	Various enterprises, including Société des bains de mer de Monaco and casinos.
12	Elizabeth II	Queen of the United Kingdom and other Commonwealth realms (etc.)	United Kingdom	$530 million[2] — $520 million[1]	From property, jewelry and other assets. See Finances of the British royal family.
13	Charles, Prince of Wales	Prince of Wales	United Kingdom	$420 million[1]	From property, jewelry and other assets. See Finances of the British royal family.
14	Beatrix of the Netherlands	Queen of the Netherlands (abdicated in 2013)	Netherlands	$200 million[2]	Real estate, investments, and a stake in Royal Dutch Shell.