Shorting stocks, of course. Food prep, weapons and ammo prep, and buying land to farm. You will need chickens and a way to continually feed them. You can live without cows, goats, sheep, horses, etc. Chickens and a garden are essential. Get canning equipment and storage. Learn how to do it. Even if there is no collapse, being self-sufficient like this will save you money in the long run. You need a family to run it.