Introducing SocialFi: A new concept that combines decentralized social interactions with income generation. Friend.tech, Stars Arena, and Post.tech are leading protocols in this space. Friend.tech allows users to acquire and trade "keys" for access to exclusive chatrooms, benefiting both creators and users. Stars Arena connects to X accounts and allows users to buy/sell "tickets" and tip creators. Post.tech copies X's interface and offers rewards for active users. Recent data shows the growing popularity of these protocols, but security concerns remain. Users should conduct their own research before investing.