The King of Thailand, Queen of England, Sultan of Brunei, and various other royals get left out of most lists, which focus on the richest private individuals.

And, from Forbes most recent listing of richest royals, the richest of them would only tie the 9th on their list of (private) billionaires).

Forbes has him at number two, with Carlos Slim from Mexico still as number one.

Regardless, I think it is pretty apparent that money is not his bottleneck.