Interestingly, an Australian entrepreneur has taken pains to point out that unlimited growth cannot happen in a closed system, and that we should stop acting like it can...
Sustainability is a key to long term prepper survival - you have to operate on limited resources, doing much with little, not relying on being able to just get new items off the shelf (or equivalent) - and must be able to reuse what you have...
You have to plan ahead...
If you were low on food, and found a couple of chickens, would you eat them? Or would you keep them safe, eat some of the eggs, allow some to hatch, and try to find ways to have your new food supply last as long as possible? A quick feast might fill the belly, but a few days later you're back to where you were; at least if you are hungry a few days longer, you secure your future.
There are a few other, large scale business leaders who are coming around to this thinking, forgoing short-term profiteering, in exchange for the possibility of something better...