*sighs* I remember my riddles topic that I made last year, I wonder how its doing.. But I ramble. It was a pretty good one but it didn't take me too long to get it... Cuz i read the first post.. lol
I figured it out by reading the rich & poor clauses though, because man is both greater than God (who may or may not exist) and more evil than Satan (who may or may not exist.) At least, in my opinion, the possibility of nonexistence make the greatness or morality of these beings sketchy.
The poor have nothing, and the rich need nothing. Therefore, the answer is nothing.