Well.. Greed is essential in helping you to reach out more for profit otherwise, you would have settle with your little success. I think striking the balance and maintaining it is what is important as far as greed goes!
Do not be greedy, they will probably kill you at any time, set goals for yourself to achieve a specific goal, so it can be said that in business must have specific goals clearly , so I think we should be strong in learning who to go ahead and ask for their help.
Business is never about greed. It is always about profit maximization and you have to work 20 hours out of 24 hours to succeed. Besides, you have to keep your cost as small as possible and this also contribute to your profit maximization motto. Having said that, one can later on do charity works as well upon achieving financial stabilities. And even upon achieving a financially stable state, you might never stop dealing in your business because the more, the better.
I very much agree with your thoughts. This market, if we are greedy, only makes us lose more money. I am currently investing and I am dividing the three selling points to make a profit. But the last mark I sold did not exceed 7% of profit. This made me feel safer.