Happiness.

Whatever you wish for is rarely what makes you happy. Rich people have same-ish issues with depression as the rest, even though you'd think they can have all their wishes fulfilled.

We have the tendency to see the next thing we want, and to think "ahh, then I'll be happy. Just that one more thing". Then we get it and hours/weeks/months later we think, "really, that thing?".

Happiness probably doesn't look like what I imagine. Maybe it's hard work, but just so fulfilling? Maybe it's harm to me, which brings me to a whole different path of life? Or hell, maybe it's just a wad of cash, but at least I know it will make me happy.