All eyes are on Ethereum's Fusaka upgrade. Key Takeaways Ethereum’s Fusaka upgrade launches Dec. 3. Past upgrades have triggered rallies. Analysts remain unconvinced. Ethereum is preparing to implement its next major network upgrade, known as Fusaka, on Dec. 3, 2025, a shift that developers say will boost blockchain capacity and lower transaction costs. The launch comes at a pivotal moment for Ethereum, with ETH’s price hovering near key technical levels that analysts say will decide whether we s ...