Who is the billionaire chess player?

Excuse me, could you clarify who exactly you are referring to as the billionaire chess player? Is there a specific individual in the chess world who has amassed a fortune that has placed them in the billionaire category? If so, I'm curious to learn more about their background, how they became successful in chess, and how they've been able to accumulate such a vast wealth. Are they still actively participating in chess competitions, or have they transitioned into other business ventures or philanthropic endeavors? I'd love to hear more about this fascinating individual.