Could you elaborate on the concept of a
cryptocurrency exchange app? As a finance professional, I'm curious to understand its functionality and significance in the digital currency landscape. Specifically, how does it facilitate the buying and selling of cryptocurrencies? What are some of the key features and benefits that these apps offer to users? Additionally, are there any security measures implemented to protect users' funds and transactions? Understanding these aspects would help me gain a clearer perspective on the role of exchange apps in the crypto market.