Claiming that iron reserves on the moon are valuable because they make it easier to maintain control of the iron reserves on the moon isn't going to convince many people, and zero competent people.
Iron reserves on the moon / asteroid / space are only going to become valuable once there is a reason to mine, smelt and forge in space, outside of Earth's gravity well. So if we can ever get say giant space ships and space stations built in space, sure. But unfortunately, that looks unlikely this century.
Don't know why you are being downvoted... I've noticed that this whole asteroid mining (or really mining of any extraterrestrial body at all for that matter) has almost reached meme levels of hysteria here on hackernews... I too don't understand it.