Assuming that's actually true, what an amazing picture it paints of him just being a complete fucking dick. It's not like the money he was making from that mattered at all... he did it just for shits and giggles. What an unbelievable asshole.
He successfully managed to leverage market forces to create economic inequality and make himself 'rich' in the micro context he operated in.
Which is a great example for why great wealth is not a virtue, a 'free market' is not a savior, and why greater regulation and taxation on the super wealthy is acceptable - they got there by being, as you say, unbelievable assholes.