The same principal applies to states, and that's why they shipped the gold to USA to begin with...to save it from the Russians.
Gold is for when that stuff hits the fan: no one will take your paper money or if they do, you'll need 50lbs of trillion billion dollar bills to buy a loaf of bread. By noon the price will double.
If you're net liquid worth is well into millions, why not have a few hundred gold coins laying around? You might lose money (compared to the stock market returns) but so what. Peace of mind. Never know. All eggs in one basket and all.