There are a number of ways to look at this. If I pay a heap of money for some fish and breed them, then sell them for half of what I paid but still make a fortune, am I being greedy? My hobby is probably still running at a loss. If you look at most breeders and their overall investment and ongoing expenses few would be making a profit and none would be getting rich so is that greedy? I think it is mainly a way of paying off some of the debt. The market sorts it out in the end.