The Forbes rich list has some criteria such as from their own revenue or share prices. Basically private market generated wealth. There are exceptions and the line gets blurred really quickly, but thats their stated goal.
Pretty simple with public companies. With private companies and current market it really does get messy. I'm thinking about Valve and how much higher it would be priced on public market compared to private... And that can't be only case. So the private market is quite dark place...
Yes, and most people aren't actually trying to be on the rich list. When I was in Monaco people were saying leave the bragging to the Americans. There is no transparency in the markets, thats also a distinctly American half-goal.
