He scams the scammers, works a regular job, saves his cash, invests in real estate and has a blast. If that's parasitism, we need more of it.
He is no different than the character Trina in Frank Norris’ McTeague, a novel about the crippling effect of greed. This guy certainly does sound like he parasites of his friends, which sounds like greed to me, and no, we don’t need more greed.