Fusaka is activated: Ethereum enters a new era

On December 3, 2025, Ethereum crossed a major milestone with the activation of Fusaka, its most ambitious update in years. Promising increased scalability, reduced fees, and an improved user experience, this technical evolution is generating enthusiasm among investors and developers. Analysis of an event that could redefine the future of crypto.

Ethereum Fusaka is finally here: a look back at a historic day 

The Fusaka update was successfully deployed on December 3, 2025, at 21:49 UTC, marking a turning point for Ethereum. After months of testing and anticipation, the crypto community followed its activation live on social media and via a YouTube live organized by Vitalik Buterin’s teams. Unlike some past updates, Fusaka was deployed in just 15 minutes, without major network interruption, demonstrating the ecosystem’s growing maturity.

This update bears a symbolic name, Fusaka, merging Fulu (consensus layer) and Osaka (execution layer), in tribute to the Devcon 2025 held in Japan. Developers emphasized the importance of this stage, which fits into Ethereum’s long-term roadmap. Validators, prepared for weeks, quickly adopted the new parameters, confirming the protocol’s robustness. For many, this smooth activation reflects the progress made since the switch to proof of stake (PoS) in 2022.

Fusaka: improvements available after the Ethereum update

The Ethereum Fusaka update introduces major changes, starting with PeerDAS (Peer Data Availability Sampling)! A technology that allows validators to verify data by sampling small fragments rather than entire blocks. The result: the processing capacity of rollups (Layer 2) is multiplied by 8, while storage costs are reduced by 80%. A crucial advance for solutions like Arbitrum or Optimism, which depend on Ethereum’s efficiency.

The gas limit per block was also raised to 60 million, improving Layer 1 throughput and reducing fees for end-users. Another novelty: the integration of passkey signatures, like Face ID or Touch ID, simplifying access to decentralized applications. Ethereum, however, invited the community to monitor the network for 24 hours to detect any anomalies, reflecting a cautious but confident approach.

These concrete improvements meet the expectations of users, tired of high fees and limited scalability.

Is ETH ready to explode? 

The burning question on investors’ lips: can Fusaka propel ETH’s price to new heights? In the short term, major updates are often followed by a “buy the rumor, sell the news” effect, but analysts remain optimistic for 2026. Fee reduction and throughput increase could attract more users and institutional investors, supporting increased demand.

Some experts predict a return to $3,500 or more if adoption follows. Rollups, now more efficient, should benefit from an influx of DeFi, NFT, and blockchain gaming projects, strengthening Ethereum’s utility. Facing competitors, this update also confirms Ethereum’s ability to innovate without sacrificing decentralization. A strong argument for long-term investors.

Fusaka marks a turning point for Ethereum, combining technical innovations and long-term vision. As the community watches the first effects, one question remains: will this update be enough to sustainably reinvigorate ETH? Between technological optimism and financial caution… Do you think Fusaka will change the game for crypto?