I disagree with cat on a soapbox. I feel that you can be a billionaire without having to flaunt and have people know you are extremely wealthy. there are many people like that, you are just unaware of them because they decide not to disclose their financial information.
I do agree with hot rod loves you and if I had the money I would help as many people and causes i could with it. I have everything I need now and I have seen so much pain and suffering that anyone with extra money should give what they can to people and causes who need it.
An old Jewish proverb is states "A rich person is one who is happy with what they have"