According to @star_okx, decentralized exchanges (DEXs) and centralized exchanges (CEXs) serve fundamentally different roles in the cryptocurrency ecosystem. While DEXs prioritize open, permissionless access and self-custody, CEXs focus on accountability, regulatory compliance, and user protection. DEXs act as tools without intermediaries, leaving users fully responsible for their funds, whereas CEXs custody funds and have obligations such as fraud prevention and AML compliance. This distinction underscores the importance of understanding the unique roles and responsibilities of each type of exchange.