Everyone's asking the wrong question. Will AI replace us? Will jobs disappear? Will new ones be created? The truth is that nobody really knows — and anyone who claims otherwise is probably trying to sell you something. But there's a far more interesting question, one that touches the roots of how economies actually work. Not "which job will disappear," but what happens to the structure of markets when AI enters the picture. And the answer, in my view, starts with one word: arbitrage.