The document compares centralized exchanges (CEX) and decentralized exchanges (DEX) in the cryptocurrency market, outlining their respective characteristics, advantages, and disadvantages. CEX offers high liquidity and ease of use but comes with security risks, while DEX enhances user control, privacy, and security but may lack liquidity and have complex interfaces. The choice between building a CEX or DEX should be based on user needs, resources, and strategic goals, considering factors like security, compliance, and potential market volume.