These fintech leaders are built to deliver strong performance for the long haul.Fintech is a high-growth industry that's evolving rapidly. Businesses and consumers are embracing innovative solutions to numerous problems and inefficiencies, and the companies that provide the best solutions are primed to deliver impressive returns to shareholders. These three fintech stocks are standout leaders with competitive advantages and strong growth prospects.1. BlockBlock (SQ 3.38%) is a fintech powerhouse, but it can ...