Elon Musk's X is launching XChat in beta with encryption, vanishing messages, and file sharing.XChat aims to enhance privacy on X, aligning with Musk's vision for an everything app.XChat will support audio and video calls, have Bitcoin-style encryption, and already accessible to some paid subscribers.X aims to become an 'everything app' with private, encrypted features, similar to China's WeChat, under Musk's leadership.