Why do we use IOTA?

Why do we choose to use IOTA? Could you elaborate on the unique advantages it offers compared to other cryptocurrencies? What are the key features that make IOTA stand out in the world of finance and digital currencies? How does its tangle-based architecture improve scalability and transaction speed? Furthermore, what are the potential applications of IOTA in various industries, such as the Internet of Things? How does it contribute to enhancing data integrity and security? Lastly, could you discuss the future prospects of IOTA and its potential impact on the global financial ecosystem?