The problem for Bitcoin is that it needs an ISO code to get loaded into existing trading systems as an instrument for investment. Not having one is a monumentally serious handicap, making Bitcoin as fringe as North Korea Telecom.
Can someone explain how bitcoin would likely be traded on these systems? I'm not an FX trader, but I'm going to guess those systems aren't going to change their security and storage system to handle bitcoin. Wouldn't it be likely that they are just trading bitcoin credits, and not the real thing?