In addition to Grims post, the need for domestic gold mines will be crucial once gold skyrockets. Country's will be battling for gold and mines in unstable countries will be taken over by roving militia IMO. Once dollar collapses commodities will be the only thing worth owning. Gold and Antimony in those hills hopefully.

http://www.nytimes.com/2011/03/04/world/americas/04colombia.html