It depends on things like how flexible your investment options are with your 401k program, if yours is through work and your employer also contributes a percentage, and the big one, how long have you been investing and how long before you need the money.

The two best ways to protect yourself from unstable times is through diversification and long range investing. Try to get fast growth in these conditions you're likely to lose. It might be an idea to actually pay someone to help you look at your financial options, although right now even they might be a bit uncertain as nothing happening makes any sense.