So Coinbase has marked up its prices somewhat. After entering the code, you may or may not be directed to verify your ID. Additionally, Coinbase claims that two Ethereum wallets will be able to send and receive large amounts of USDC round the clock and at fast speeds. Coinbase is one of the most popular Bitcoin brokers — in fact, its user base has surpassed that of stock brokerage Charles Schwab. The exchange has justannounced that Coinbase Custody, its branch providing custodian service for institutional investors, is now adding support for Ripple XRP.