Key Takeaways: Vitalik Buterin says Ethereum could serve as a resilient alternative to centralized digital payment systems during crises. Sweden’s push to store physical cash highlights growing concerns over the fragility of cashless infrastructure. Buterin is pushing for Ethereum upgrades to improve privacy, offline usability, and node accessibility. Ethereum co-founder Vitalik Buterin has raised concerns about the risks of centralized digital payment systems, pointing to Sweden’s shift away from its aggressive cashless agenda as a cautionary example. Buterin said Ethereum could serve as a decentralized fallback in times of crisis. Sweden, once seen as a global model for cashless adoption, is now urging citizens to keep physical currency on hand, according to a March 16 article by The Guardian. Sweden Urges Citizens to Keep Cash Amid Crisis Preparedness Push Government-issued guidance recommends households store at least a week’s worth of cash in case of war or national emergency. The move follows growing anxiety over cybersecurity threats and the vulnerability of digital systems during periods of unrest. “Nordics are walking back the cashless society initiative because their centralized implementation of the concept is too fragile,” Buterin posted, referencing the article. “Cash turns out necessary as a backup.” While only 10% of Swedish transactions now use cash, authorities are reassessing the overreliance on central infrastructure. Buterin sees this as an opening for decentralized systems like Ethereum to step in — not just as an alternative, but as a more resilient and private solution. @rohangrey has done a lot of deep thought in this direction. We basically know how to do it, but with the limitation that any solution depends on trusted hardware and/or post hoc enforcement against double-spenders. — vitalik.eth (@VitalikButerin) May 25, 2025 For Ethereum to fill that role, it needs to meet high standards of reliability and privacy. Buterin emphasized the importance of advancing zero-knowledge proof-based technology to allow private, offline transactions. However, he cautioned that current solutions still rely on trusted hardware or enforcement mechanisms to prevent double-spending. “The know-how is there,” he said, “but trustless execution under extreme conditions remains a work in progress.” Buterin Proposes Node Upgrade to Boost Ethereum Accessibility Last week, Buterin unveiled a new proposal aimed at making it significantly easier for everyday users to run Ethereum nodes, by reducing the hardware and storage requirements currently needed to sync with the network. The Ethereum mastermind suggested a shift in how nodes store and retrieve data, moving from full data replication to a more flexible, user-centric model. Under this approach, nodes would store only the data relevant to the user, rather than Ethereum’s entire global state, which currently exceeds 1.3 terabytes, according to Etherscan. “Currently, the overhead is impractically high,” Buterin wrote, adding that even with ongoing optimizations, the cost of operating a full node will likely remain out of reach for most users without specialized hardware or cloud support. Earlier this month, Connor said Ethereum’s “biggest mainstream moment” could come through its integration with AI, as the sector struggles with centralization, opaque algorithms, and growing privacy concerns. “AI is plagued by black-box models, centralized data silos, and privacy pitfalls,” Connor noted, adding that Ethereum is uniquely positioned to address these issues. The post Vitalik Buterin: Ethereum Can Be a Financial Lifeline Amid Cashless Concerns appeared first on Cryptonews .