The love of money is the root of all evil. 1 Tim. 6:10.
Interestingly the NKJV and the NIV say it is "a root of all kinds of evil" (the Greek says "rhiza gar pantôn tôn kakôn estin hê philargyria", maybe y'all can tell me if that's a better translation).
But yes, it is apparent that there are other sources of evil. Insanity may be one of them, although if a person is insane they are probably not making conscious choices to be evil. (okay, I Am Not A Psychiatrist...) Pride may be another (maybe the big one, as it's how Lucifer is supposed to have fallen...)
BTW getzburg, Gargamel was after money. He wanted to use the Smurfs in his alchemy to turn lead into gold. The cat Azrael was probably more interested in eating Smurfs. Don't ask me how I know this.