Citi is seen on the floor of the New York Stock Exchange on March 3, 2025.Citi is aiming to launch a service for the custody of crypto assets in 2026, an executive at the bank told CNBC, as Wall Street giants expand their footprint in the digital currency space.Biswarup Chatterjee, global head of partnerships and innovation in the services business at Citi said the bank has been developing a crypto custody service for the last two-to-three years and is making progress."We have various kinds of explorations ...