That's an interesting prediction to make of a guy who became famous because his personal sense of ethics overpowered every other concern in his life. It's hard to imagine him trying to cash in on that fame.
What else does he have to cash in on? He's not a saint.
There's been more evidence that he's selfless rather than selfish, though. So the insinuation that he's playing the self-gain game is a bit more of a stretch.