I know 2 persons who lived through USSR political and economic collapse. They told me that the only currencies acceptable for food, clothes, services of any kind was jewelry and Gold. I still think that despite the fact that Gold is not investment at all, it is worth to keep some coins, just in case. Also I heard a story like one businessman in early 1900s came to New York where 1Oz gold coin would buy a night in best hotel, nice dinner etc. Today, a century later, 1 Oz Gold = $1,227 what surely would buy you a nice hotel room, good dinner with some change. Of course a century ago $20 per 1 Oz vs $1,227 today - here is the 100 years inflation.