That's the vague Idea of something I want to find. Are there any good websites that post interesting facts about Billionaires?

On the contrary, it looks like quite a specific request to me. And I have just the website you need in my bookmarks. Here, try reading this article about Petr Aven [url=https://dbpedia.org/page/Petr_Aven]https://dbpedia.org/page/Petr_Aven[/url] . It is very specific in the facts it shares. Lacking quality these days.

Thank you! And you are right. Every time I want to find a piece of specific information I get absurdly long articles with useless information.