If the Reserve ever suggested Bitcoin was under its purview it would establish the currency instantly. A regulatory body cements its existence as a viable currency, especially one done by the state. This was a wise move by the Federal Reserve.
But good luck on any international framework. The benefits of the currency being cross border won't be apparent until there's more mutualization within our monetary bodies. Consider the bit coin from a Euro perspective, no central authority has been given which makes any and all regulation as well as responsibility....problematic. Such is the nature of a currency mainly dependent on fiat...