Diversity is the only free lunch. Time in the market will be your best response to such an event. Kindly note that even in a economic crisis event we fund projects cash and are not listed on a stock market. We will not see rapid price decrease but will endure other difficulties like struggling to find rental occupants or buyers for property units. As a cash buyer you can ride this out and not bonded to a bond repayment. Kindly note how much higher the S&P, Dow and any other index are a few years after the crash. The art is not to panic and sell at the bottom. Every financial product has its place in the market but most insurance policies just increase costs and lower profits.