Do you have more than me? Then you're rich and I'm not. This is how almost every single human being alive right now or alive in the past thinks. I have a life

Do you have more than me? Then you're rich and I'm not. This is how almost every single human being alive right now or alive in the past thinks. I have a lifelong friend who through a combination of luck, hard work, and being a legitimate genius is now wealthy ($10,000,000+ net worth and climbing). However, he and his wife insist they are not 'rich'. If you own a penthouse in a 30 story condominium and a lake house on the Great Lakes and haven't flown less than first / business class in the past 10 years, you're rich by any nation's standard.