If we "win" in Iraq, is that the end of terrorism? Or do we just move on and invade another country?

and fight them there? If we do, won't they just go back to Iraq or Syria, or Lebanon or a host of other countries. Are we going to bankrupt ourselves running around the globe fighting an enemy we can't identify until after they attack? Wouldn't it make much more sense to secure our own country to the best of our ability?