The Ethereum blockchain network just got a fresh jolt of activity, but JPMorgan Chase (NYSE: JPM) isn’t convinced it’s the start of a lasting revival. Launched by 2015, Ethereum is one of the most widely used blockchain networks because it allows developers to deploy decentralized applications (dApps) onto it. In a note to clients this week, the world's largest bank pointed to the network's Fusaka upgrade, completed in December 2025, which increased Ethereum’s data capacity and immediately pushed transaction fees lower. The result: a short-term spike in transactions and active addresses. The Fusaka upgrade, following ... (full story)