One location is a bad thing, you could be forced to reveal it multi cache better system. Cash expecially cotton or paper money can be destroyed by mold, coffee can in back yard is only short term storage.
In most places gold can be traded but as whirl has said what is the exchange ratio, water a meal a sat call can be an oz of gold in war zone. There is a reason most special forces carry 10 oz of gold on them for emergencies.