0x is a decentralized protocol for building decentralized exchanges. Due to the increasing number of Ethereum based tokens and the DeFi industry, the need for a peer-to-peer exchange rises. To participate in the Defi industry or add a financial fountain to DeFi projects, one needs to access 0x and buy ZRX. So if you are planning to be more active in the Defi projects, it is better to buy some ZRX soon.