If you are talking about fiat currency, the most obvious and current way of doing it in a decentralized fashion is to pay your power bill while mining for alt-c

If you are talking about fiat currency, the most obvious and current way of doing it in a decentralized fashion is to pay your power bill while mining for alt-currencies. You pay USD for electricity, the electricity is used for a portion of the payment infrastructure, provides services for it, and you get paid for it with coin. You've effectively turned a payment to your electric company into coin in a highly decentralized way. For crypto exchanges, there are several ways to do this including Ripple, Ethereum (when it is done) and Mastercoin. See this article on the exchange Mastercoin is launching in March: http://www.cryptocoinsnews.com/2014/01/31/mastercoin-is-launching-a-distributed-exchange-on-march-15/ http://www.cryptocoinsnews.com/2014/01/31/mastercoin-is-laun...