Gold is the typical place to keep your money during a crisis. If you look at storical data the real buying power of gold as remained steady since Roman times more than 2000 years ago.
The problem with gold is that it's not productive, so in normal (non crisis) times you'll do much better with stocks, real estate or bonds (long term your purchase power will increase instead or remaining static).
Check out
E-gold if you're interested in buying some gold easily.