“Could a non-state issued digital currency like Bitcoin become a global reserve currency? The idea is intriguing on a number of levels. In terms of retaining value though thick and thin, the ultimate reserve currency cannot be printed with abandon by a government. Gold and silver have served as the ultimate reserve currency, as precious metals can be traded for commodities and services, provide collateral for debt and serve as reliable stores of value. While many observers believe gold is still the only reliable reserve currency (or the only reliable backing for government-issued paper money), it’s a worthy thought experiment to ask if a digital currency could also act as a reserve currency.”
http://www.oftwominds.com/blognov13/bitcoin-RC11-13.html