December 2025 is set to be a pivotal month for the cryptocurrency market, with several key events on the horizon. On December 3, Ethereum's mainnet will undergo the Fusaka update, designed to reduce transaction fees and enhance network security. This upgrade is expected to have significant implications for Ethereum's performance and user experience. Dogecoin will mark its 12th anniversary on December 6, a milestone for the popular meme cryptocurrency. Meanwhile, the Federal Reserve's interest rate decision, anticipated between December 9-10, could have broad effects on financial markets, including cryptocurrencies. Additionally, December 12 will commemorate the 14th anniversary of Satoshi Nakamoto's disappearance, with over 1 million BTC still in wallets associated with the Bitcoin creator. Finally, U.S. inflation data for November, set to be released on December 18, may influence the Federal Reserve's monetary policy, potentially impacting crypto market dynamics.