Could you please explain in detail what CoinJar does and how it functions within the cryptocurrency space? I'm curious about its specific services, user interface, and any unique features that set it apart from other platforms in the market. Additionally, I'd like to know if CoinJar offers any educational resources or support for beginners looking to navigate the world of digital currencies. Lastly, could you discuss any potential security measures in place to protect users' funds and personal information?