Ethereum jumped 3.4% to US$4,083 in active trading as optimism grew around the upcoming Ethereum 3.0 upgrade expected to enhance scalability and reduce gas fees. Daily volumes hit a two-week high of US$45 billion, with DeFi and layer-2 tokens following suit. Developers confirmed final testnet deployments are on schedule for early November. Analysts said institutional flows are building as Ethereum maintains market-share lead over competitors. If network performance improves post-upgrade, ETH could challenge its 2021 high of US$4,865 within months.