Ethereum's Fusaka Upgrade: The New Norm in Decentralization and Scalability?

In the complex world of crypto Developments are never static. Vitalik Buterin's recent statements about Ethereum promise a reassessment of our understanding of decentralization and scalability, something that is also relevant for BitcoinEthereum's roadmap, especially with the introduction of PeerDAS and zkEVMs, offers a fresh perspective on what a "decentralized network" could mean in the not-so-distant future.

On December 3, 2025, Ethereum activated the Fusaka upgrade, with PeerDAS as the notable innovation. Rollups, which place transactional data on Ethereum, raised the question: how do we verify that this data is truly available without every node having to download every byte? The answer lies in sampling. Nodes are given access to a portion of the blob data, and by checking random bits, the presence of the entire data set is guaranteed with high confidence. This innovation aims to increase throughput without exponentially increasing the workload for regular nodes. This is crucial, as high synchronization costs can be beyond the reach of individual operators, threatening centralization.

The Fusaka upgrade also introduced "blob parameter-only forks," which allow Ethereum to gradually adjust blob capacity based on how well the network can handle demand. The associated scheduling and the increase in blob targets within these mini-upgrades underscore the intention to increase this data capacity in a controlled manner and without major disruptions.

While PeerDAS is already operational, the discussion is now focused on zkEVM. This technology promotes a paradigm shift from speed to provable security. The Ethereum Foundation has outlined clear milestones, such as achieving 100-bit provable security by the end of May 2026, which is essential for validating transactions without having to repeat every step of the execution. This means a different way of trusting the network: it relies more on cryptography and who produces the proofs.

Bitcoin's position in a changing landscape

What does all this mean for Bitcoin? At a time when Ethereum is trying to expand its flexibility and scalability, Bitcoin cannot afford to simply bask in its technical superiority. Bitcoin must continue to focus on its role as the most reliable and comprehensive base store of value. The crucial question is whether Bitcoin can maintain its reputation in a landscape that is becoming increasingly competitive due to Ethereum's evolution.

If Ethereum succeeds in scaling data availability and effectively implementing proof-of-sale validation without compromising the fundamental trust principles of decentralization, a second credible settlement layer will emerge in the market. This will change the dynamics of how we view value on the blockchain. The block space premium that Bitcoin currently enjoys could be under pressure from these developments on Ethereum.

Furthermore, Ethereum's shift toward more decentralized validation could impact how users interact with crypto. If users help make blockchain transactions more effective and affordable, Bitcoin could become the safest way to store value remotely. Bitcoin's role could then become more of a safe haven, while Ethereum positions itself as a network for everyday transactions.

The future of blockchain networks

We must be cautious when drawing conclusions about the future, and realistic scenarios are crucial. Whether Ethereum succeeds in its ambitious plans, whether through a slow and cautious rollout or a rapid expansion, it will play a significant role in shaping its competition with Bitcoin. It is essential that Bitcoin maintains its core values ​​of decentralization and stability in a world where scalability is becoming increasingly important.

The debates about the various networks will force us to reevaluate the functions we ascribe to crypto. This leads to an important reflection on what we want from digital assets and the networks that support them.

Frequently Asked Questions

What is PeerDAS and why is it important?
PeerDAS is an innovative system that accelerates the validation of blob data within Ethereum and reduces node workload, crucial for scaling the network without sacrificing decentralization.

How does Ethereum's scalability compare to Bitcoin?
Ethereum's drive for scalability and speed could impact demand for Bitcoin's block space, especially if Ethereum can create a credible second settlement layer that can compete without compromising decentralization.

What are the main risks for Bitcoin as Ethereum develops?
Bitcoin risks losing its position as the most reliable foundational layer, especially if Ethereum effectively implements its technologies and offers users a cheaper and more user-friendly experience without sacrificing decentralization.