[colechristensen]

Being rich doesn't make you automatically happy, you can hear many stories about billionaires who have and have achieved everything they could possibly want being miserable – wanting things and then getting them isn't the source of happiness, being faced with this reality firsthand by running out of things to want and still feeling dissatisfied with life can be (imagined at least) really miserable and hopeless.

[digitaltrees]

The line is subsistence, not being a billionaire. If you don’t have food, shelter and health care you are often very very in happy. If you have those, each additional dollar contributes a much smaller degree of happiness. The research suggest the line for diminishing returns in the US is $80k in most cities.