A robber decided to maximize his risk-to-earnings potential yesterday by holding up two banks in Athens, which were 200 meters apart, within minutes of each other, police said. The suspect entered a branch of the Bank of Cyprus on Idomeneos Street in Ilion, western Athens, with a short-barrel shotgun at 8.05 a.m. and ordered staff to hand over some cash. After grabbing his loot, he then jumped on his scooter and, as police were heading toward the bank he had just raided, rode to a nearby branch of Nova Bank, on the same street. He went through the same routine there, forcing employees to give him an unspecified amount of cash before he got back on his scooter and rode off. Police said that it was not immediately known how much money the robber made off with.