Walter Jon Williams' "Hardwired", 1986. Protagonist had billions of dollars on a chip that he had implanted in his body for safekeeping. I thought "that will ne

Walter Jon Williams' "Hardwired", 1986. Protagonist had billions of dollars on a chip that he had implanted in his body for safekeeping. I thought "that will never work." He also had people jacked in to the stock market, getting 10-second loans to trade with. I thought that would happen one day, but we just have algorithms doing that for us.