An excellent passport that gives the holder access to a world of private banking, private tax havens, income tax with no tax, and no residency requirements. Saint Kitts and Nevis was the first country to open the "Citizenship through Investment" program, which it did in 1984. Over the ensuing decades, it has been revised to maintain its importance, and the Saint Kitts and Nevis program remains the best in the Caribbean. Second Passports and Citizenship