Last week Venezuelan President Nicolás Maduro said his country had found “the perfect kryptonite to defeat Superman!” By Superman he meant the U.S. And by kryptonite he meant cryptocurrency – el petro . The petro is the cryptocurrency Venezuela recently created to raise desperately needed cash as it sinks deeper into the world’s worst economic collapse today. Maduro touts the petro as a way around U.S. financial sanctions that prevent his authoritarian socialist regime from raising money in bond