The AI Agent Economy is rapidly evolving, with autonomous AI agents increasingly participating in value creation and exchange, forming the A2A (Agent-to-Agent) ecosystem. This shift is driven by the need for AI-native systems that transcend traditional human-centric business models. As AI agents become more autonomous, the demand for AI payment protocols has surged, with major tech companies and financial institutions racing to establish strategic positions in this emerging market. The development of AI protocols, which serve as the foundational infrastructure for the Agent Economy, is accelerating. These protocols enable AI agents to communicate, exchange value, and collaborate across open networks. Despite the current fragmentation in AI protocol standards, there is a growing consensus that crypto will play a crucial role in AI payment systems. However, regulatory constraints and the need for compliance have led to a reliance on fiat APIs in the interim. The convergence of AI and crypto protocols is seen as inevitable, with AI protocols focusing on communication and collaboration, while crypto protocols emphasize governance and value attribution. As AI continues to evolve, the Agent Economy is expected to redefine economic interactions, with AI-native financial systems like AIFi (Artificial Intelligence Finance) emerging as key components of this new paradigm.