Although I have doubts about the original poster's veracity, he does ask a valid question. However, since no one has discussed what speculation in FX is like at large level, I'll offer my two cents. Since deception is key, it would be advisable to have at least 10 accounts with different brokers. That way, you can move size without attracting too much attention. FX, at the highest level, is a very insular game, and all the players have a good idea what their opponents are holding in their hand. In fact, if you have a big position and don't know who's on the other side( and not think it's just the dealer on the other side, as they lay it off), then you have a big problem. Instead of trying to be a big swinging dick, it's better to check the ego at the door, and try to concentrate on making money.
Jeff