Happiness ↔️ Money
You don't have to be rich to have money. Just about everyone has money. My child just earned $.25 for switching the laundry from the washer to the dryer, so even she has money. Scientists were curious about what happy people spent their money on. That's the subject of this article in Inc.
The question this research asks is a good one. Perhaps we're tired of hearing that rich people are miserable or poor people are somehow deeply satisfied with their poverty. I like the idea that there is a way you can spend even your paltry savings (or all of your wealth) that will increase your happiness.