I remember a study saying roughly 50 000 eur or 70 000 dollars annually and after that the increase of happiness with money is negligible. But that was like 15 years ago at least so I'm thinking it's more like 80k eur and 120k USD or smth at the moment at least.
But yeah after that what's to worry about
I'm not sure what the average was, something something EU something. I don't recall whether it was a specific country or an index of some sort.
But yeah I'd be fine with 50k. Idk if I'd be "have a house and a nice car" fine, necessarily, but yeah.