Billionaire gains on investment in oil refiner ahead of rule change This is the epitome of crony capitalism. Billionaire Carl Icahn is a special adviser to Trump on regulatory reform while he continues to actively invest with no transparency or oversight of trading on inside information, which ethics experts have called a huge conflict of interest and violation of federal rules. And the profiting has begun. One energy company owned by Icahn has doubled in value since the election. Trump and Icahn are hoping we won't notice --