All depends on the context of the thing.
But happiness is necessary for the good being of any human.
So yeah. Happiness.
But you have to live both worlds in order to understand rightly and take the good decision. Which i haven't. YET.
I used to be one of those people who said happiness, but now that I'm in college I say money. Money can get you some happiness, and just happiness itself will lead to stress when I'm paying back these fucking loans lol.