Even Aliens prefer Gold to Fiat Currencies

I watched the movie "Cowboys and Aliens" last night. A brilliant movie, but the high point for me was the fact that these alien monsters had came across the galaxy not to steal our women, our US treasury bonds or our multitude of fiat currencies, no they came to steal our Gold! To quote Olivia Wilde's character "Gold is rare on their planet too". The alien bugs even bring their own ore crushing mill, refinery equipment and 457 visas.