Nineteen-year-old **Idris** lived in two worlds. To his neighbors, he was just a quiet boy who spent too much time under the shade of the acacia trees. But to the digital world, Idris was a ghost—a ghost who had found a way to bridge the gap between a country without international banking and a global economy that never sleeps. ### The Barrier In Eritrea, the traditional financial "grid" is a wall. No Swift codes, no PayPal, and no way to receive a paycheck from a client in…