In his best-selling Irrational Exuberance, Robert Shiller cautioned that society's obsession with the stock market was fueling the volatility that has since made a roller coaster of the financial system. Less noted was Shiller's admonition that our infatuation with the stock market distracts us from more durable economic prospects. These lie in the hidden potential of real assets, such as income from our livelihoods and homes. But these ''ordinary riches,'' so fundamental to our well-being, are increasingly exposed to the pervasive risks of a r…