Diversity is the key. Our current currency and economic conditions are a giant Ponzi scheme that requires "buy in" to continue. There is likely enough people that will continue to play along to keep it going. The question then is, what if they stop "buying in" on a mass scale? Under that condition, gold also would have little to no value until a new economy could form. That would likely be a short term condition before gold and silver would be the standard again. To fill in that gap, food and loaded guns would have the most value. Diversity is key, but the lowest level investment (food and guns) should have a high priority. Balance you investments according to your risk tolerance.