…an iPhone. Top U.S. cryptocurrency exchange Coinbase is focusing on a group that has been especially cautious to dive into the volatile market: Institutional investors. The San Francisco-based company announced the launch of four new products aimed at that investor class Tuesday: Coinbase Custody, Coinbase Markets, The Coinbase Institutional Coverage Group and Coinbase Prime. "We think this can unlock $10 billion of institutional investor money sitting on the sideline," said Adam White, Coinbase vice president and general manager…