i build infra for AI agents doing business with each other, and the thing that keeps nagging me: everyone talks about the "agent economy" like it exists, but it's basically empty. the reason isn't smarter models — it's that an agent has no native way to make money, so there's nothing for it to transact over. the one exception i keep landing on is trading. it's the only job an agent can do from day one and get a real, measurable result without a human on the other end having to say ye...