Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

What should I invest in to hedge against a serious crash or calamity?
If peak oil is a concern, hedge against the effects of high oil prices.  Reduce your dependence on the gas pump by moving closer to the places you normally drive, or adjust your lifestyle so that you need less.  Buy things now that depend on fossil fuels (there's a long list). If instability is a concern, invest in a place where the chance of instability is less. If a freak event is a concern, think through what the consequences would be, and hedge accordingly. Etc. Etc.