Wait, what?!? Nothing about trying to strategically put yourself in an ideal situation during a recession is going to make anyone else worse off. Much of this isn't zero-sum, and assuming the investments are not rent seeking.

If I were to invest in potatoes because I thought people might need potatoes, then there should be an incentive to make more potatoes, and if people need potatoes, then more potatoes are likely to exist... which helps people get food.

If I instead concern myself with clutching my pearls and tightly as I can, and I don't invest in potatoes, then there is less of an incentive to make more potatoes, fewer people are able to buy the limited supply of potatoes, and everyone is poorer for it.