Greed is the root of all vice, as love is at the heart of all virtue. When someone like Bernie Madoff exemplifies the extent of greed, it's becomes a check-point for us - a guidepost to not be swallowed up by the temporal no matter the extent.
According to the Greeks liberty eats itself. That's Paul too - everything is permissible but not beneficial. There are definite ends to it, and, at the end of things, it's not pretty. It's usually not worth much at the start either, since liberty most often begins with war. For the Christian that war is within the soul, the wrestling match with God himself and his word. Then, he names you and grafts you into his family. It's a match that is ugly, insulting, and causes you to limp in humility and on toward grace... always toward grace.