According to the source, a Nov 9, 2025 social post referenced an article titled What is the Fusaka Upgrade? Ethereum’s Biggest Scaling Bet Yet, but it did not include verifiable primary documentation for traders to assess scope, timeline, or included EIPs (source: user-provided social media post on Nov 9, 2025). To avoid trading on unverified headlines, ETH traders should confirm any Fusaka claims against official Ethereum communications where network upgrades are announced and scheduled (source: Ethereum Foundation blog). Catalyst timing should be anchored to concrete milestones historically used for upgrades, including EF posts scheduling testnet and mainnet activation, client release tags across Geth, Nethermind, Prysm, and Teku, and AllCoreDevs updates confirming the final scope and inclusion lists (sources: Ethereum Foundation blog; Geth, Nethermind, Prysm, and Teku client release pages; Ethereum AllCoreDevs notes). Historically, scaling upgrades have only produced durable fee or throughput changes for users and L2s after EF-confirmed activation, as seen with Dencun’s EIP-4844 introducing data blobs that reduced L2 data costs post-activation rather than at rumor stage (sources: Ethereum Foundation blog; EIP-4844 specification in the Ethereum EIPs repository). Until official confirmation appears on these primary channels, repricing ETH or L2 tokens purely on the Fusaka headline carries elevated event risk with no validated timeline (sources: Ethereum Foundation blog; Ethereum AllCoreDevs notes).