The cryptoclassic is classically thought to be all about decentralization, self-governance, and peer-to-peer production. And yet, in some kind of paradox, the central exchanges (CEXs) are one of the most resilient pillars sustaining the crypto economy. They are the gateway that connects fiat currency and digital currency, serving as brokers for trading, investment, and management of liquid assets. And why is it so essential that CEXs are, and how exactly do they benefit the entire crypto system?