(I now, blog not news)
There is one currency however that has outperformed all of these by a long shot, but you won't find it on the list. The currency is called Bitcoin (ticker symbol BTC) and it more than tripled this year.
It's not issued by a country, nor is it a precious metal or a rare-earth. Bitcoin is an electronic currency that can be exchanged for some goods and services, particularly online. The currency is not controlled by a central bank. Instead it is maintained by a global registrar and managed via a private network of participants who get paid to "rent" their computing power to the network. The "rented" machines are used to maintain the integrity of Bitcoin transactions and act as a virtual decentralized registrar.....
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....So why has the currency tripled this year? A number of rumors have been circulating in the online forums trying to explain the rally. Unfortunately one explanation that stands out is the increased demand for illicit drugs online. Quite sad actually.
Nevertheless Bitcoin is the 2012 winner for the best performing currency against the dollar.
Source: http://soberlook.com/2012/12/the-2012-winner-for-best-performing.html
Edit: And again already there. Sorry I looked for soberlook.com in the subject and didn't see it.