Not before it get's worse.
Wall Street is artificially inflated with money invested into artificial things - money put into things with no actual value. Essentially, investors gambling on risky investments.
The fallout will "trickle down" to us, but I think this is mostly going to affect the people used to multi-million dollar paychecks. We'll see the cost of goods rise, lots of housing troubles, but I don't think we are going to see food rationing or have a loaf of bread suddenly cost a wheelbarrow full of money.
Nonetheless, I'd highly recommend you stockpile a few months worth of canned food and peanut butter :D