I think green vegetables are the best food on the planet! But you won't get rich selling greens to the masses. They are plentiful, and they don't store or ship well. It is better to get your hands on a rare, "super" food item, talk it up as an essential ingredient to vitality and longevity, then sell them at a high price. This is pretty much what you get with David Wolfe. Raw cacoa is a prime example, and gogis, mangosteen, etc.
I don't want to criticize David Wolfe.....I think he is brilliant! And I will continue to buy products from him, because I am addicted to his olives!