While the formal definition of a millionaire or billionaire is based on net worth and assets, I think the issue is likely "philosophical" billionaires. It's a

While the formal definition of a millionaire or billionaire is based on net worth and assets, I think the issue is likely "philosophical" billionaires. It's a fundamentally different lifestyle, culture, and philosophy. We can tell the difference between "Inherited Grandpa's house in Los Angeles, net worth $1.4M, hobbies include PC gaming and woodworking" from "Owns the lion's share of a mining conglomerate, net worth $680M, hobbies include holding Congress hostage to preserve his future revenue streams."