For generations, the United States has served as the gravitational center of the global economy, a role sustained not by force alone but by the world's faith in American reliability. That faith is now being quietly tested, as rising debt and an expanding sanctions regime prompt foreign governments and central banks to ask whether the anchor still holds. The question is not yet a crisis, but it is no longer merely theoretical — and the distance between doubt and departure, in matters of economic trust, is shorter than it appears.