The 0x protocol has its own token called ZRX which is an ERC20 token. Thus, any Ethereum-compatible wallets will support ZRX for storage. The 0x ICO happened in August 2017 at a token price of 0.048 USD per ZRX. The total supply of ZRX tokens is 1 billion which 50% of them were available for sale. Right now, ZRX tokens are listed on many big cryptocurrency exchanges such as Binance, Okex, and Bittrex with a market capitalization of 373,582,911 USD (as of 16 Aug 2018) according to coinmarketcap.com.
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