Mobile app stock trading provider Robinhood has formally launched cryptocurrency trading, rolling the new service out to five U. Robinhood, the popular stock and crypto investing app, has officially launched bitcoin, ethereum, and other cryptocurrency trading in New York. As an example, users are required to produce multiple documents for validation and confirmation of accounts can take several days. CoinDesk is an independent operating subsidiary of Digital Currency Group, which invests in cryptocurrencies and blockchain startups. Investing in cryptocurrencies and other Initial Coin Offerings «ICOs» is highly risky and speculative, and this article is not a recommendation by Investopedia or the writer to invest in cryptocurrencies or other ICOs.