But greed, when coupled with reason, is good! What is in your rational long-term self-interest is what is good for you. To want that, to be greedy for it - to desire it above all else - is what you should always strive to do.

Please, pick apart the phrase "rational long-term self-interest" - and note that "long-term" means on the timescale of your lifetime.

I disagree with your implicit Malthusian assumption that resources can be overconsumed/hoarded in a meaningful way. The universe is chock-full of atoms and energy, and the key to unlocking more is always just a little more technology (which we have a pretty good track record at doing!)