When questioned about the essence of the cocaine business, Escobar replied with "business is simple: you bribe someone here, you bribe someone there, and you pay a friendly banker to help you bring the money back." In 1989, "Forbes" magazine estimated Escobar to be one of 227 billionaires in the world with a personal net worth of approaching US$3 billion while his Medellín Cartel controlled 80% of the global cocaine market. It is commonly believed that Escobar was the principal financier behind Medellín's Atlético Nacional, which won South America's most prestigious football tournament, the Copa Libertadores, in 1989.