What happened to GBTC & Coinbase?

Could you elaborate on the recent developments surrounding GBTC and Coinbase? Have there been any significant changes in their operations, market positions, or regulatory standing? Specifically, what has triggered any fluctuations in their stock prices or trading volumes? Are there any new products, services, or partnerships that have been announced? Additionally, how have investors and market analysts responded to these developments? I'm particularly interested in understanding the potential implications for the broader cryptocurrency and financial landscape.