BitBay (BAY) digital currency has been developed since 2014 with the eponymous market place being in operation from 2015. The coin is now listed on a few exchanges. You can purchase BitBay with fiat (hard) currency, such as USD or EUR, using a bank card.
The 0x (ZRX) token is an Ethereum-based token operating as the native token of the 0x protocol. It is noteworthy that the 0x protocol represents an open-source framework for developers. The protocol facilitates both ERC-20 and ERC-721 assets. It aims to make transactions get settled in the off-chain mode to improve overall performance of decentralized exchange.
USD Coin (USDC) is a stablecoin pegged to the US dollar (1 USD Coin = $1). This currency was founded in 2018 by the American company Centre Consortium associated with Coinbase and Circle. The support of the experienced team helped this project to reach high positions by its market capitalization (USDC is one of the top 30 cryptocurrencies).
Each USDC is backed by one US dollar held by the company in a bank account. As USDC is an Ethereum-based token, it can be stored in the Ethereum-compatible wallets. The key feature of USDC is that it has the same value as USD but it requires no bank account, it doesn't charge high fees and works internationally. USDC is supported by several crypto exchanges and business enterprises.