Seems to me that the old investor rule of thumb still applies: if you don't understand what you're buying, don't buy it.

Of course, this changes completely when you introduce the agent-principal problem. Suddenly it might be a good idea for you to do or buy stuff, even if it's bad for your employer or employers (such as the people who's money you are managing). This means extremely tough regulation is required to deal with this problem.

But regulations are communism, dontcherknow?

Peak oil is not an energy crisis. It is a liquid fuel crisis.