Coinbase Predicts Altcoin Season as Q3 2025 Approaches. Photo by BeInCrypto Coinbase, the largest US-based exchange, has filed an application with the Office of the Comptroller of the Currency (OCC) for a National Trust Charter (NTC). The move represents a significant step toward deepening its integration into the US financial system. In an October 3 announcement, Coinbase described the NTC as a natural extension of its institutional custody business, which already secures billions of dollars in client as ...