While a few big legacy finance firms have moved into crypto, others are working in the shadows to turn a profit like Chicago's Jump Trading, according to Bloomberg's Benjamin Bain. Jump handles millennial darling Robinhood Crypto's trade orders which offer lower risk compared to fast-paced professional trades. Robinhood earns profit from volume rebates from subscribing trade venues like Jump. Adding crypto to its order options helped double Robinhood's user base from April 2017 to Feb. 2018, with last year's valuation standing at $5.6 billion for the six-year-old company.