Only five days after announcing they would enable bitcoin and ethereum trading Robinhood saw more than one million signups; Robinhood has made its name on zero commission stock trading and plan to roll out the new feature in five states first; “We see millions of trades a day. In our brokerage industry there is no excuse for down time. We plan on bringing that mind-set to the crypto space,” said Robinhood Co-Founder Baiju Bhatt to Business Insider. Source.