What defines "super rich"?

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Super rich meaning one doesn't have to work for the rest of his or her life and still live a comfortable lifestyle.

I say $20M

It depends.  If you are in your 30s with no wife, children, debts you could easily get by on a fraction of that depending on where you choose to live.

Super rich>merely doesn't have to work for the rest of his or her life and still live a comfortable lifestyle

Unless of course

live a comfortable lifestyle=Bentley

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5M to 10M, depending on the circumstances. One way to look at it, is what is the number the causes one to have reached "critical mass," to wit the amount that the odds are very high that you will never need another dime of earned income during the balance of your life, even if you live to 90. To me that is "rich."

Someone that is consistently earning $300K/yr is rich by any definition of the word.  They are not middle class.  You are about to start a WAR in this thread.

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Several hundred million is probably the minimum where you could have someone else handle your investments and you don't have to worry about them.

Ahhh... A troll comment from another one of our adolescents.  I guess we can assume you've never worked a full time job and been financially responsible for a household?  Anyone who has actually had a real job and paid real bills knows that if you have several hundred million dollars you would not, "have someone else handle your investments and you don't have to worry about them."  Where do you kids get this stuff?  Ever heard of Bernie Madoff?