The gold rally fueled by the US-China trade war is unleashing a growing wave of illegal miners who are increasingly pushing into fragile environments that range from Latin America’s Amazon to South Africa. Bullion has surged 18% over three months to the highest in six years. While that’s good news for mining companies, it’s spurring a burst of illegal prospecting that has helped fuel drug trafficking and organized crime within some of the world’s top gold-producing regions.