Ethereum Soars 66.7% in Q3 2025 on DeFi Boost

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  Ethereum gained 66.7% in Q3 2025, breaking its ATH
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  U.S. regulations pushed stablecoins and DeFi into the spotlight
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  Ethereum benefited as the leading base layer for DeFi projects

Ethereum had a stellar third quarter in 2025, closing it out with an impressive 66.7% price gain. This performance not only marked a clear uptrend but also saw Ethereum finally surpass its previous all-time high (ATH) — a significant psychological and technical milestone for the market.

Unlike previous speculative rallies, this price movement was fueled by clear and impactful developments from the regulatory side.

U.S. Regulatory Clarity Ignites Ethereum Rally

The key catalyst came from U.S. legislative moves, which gave much-needed clarity and legitimacy to stablecoins and decentralized finance (DeFi). Lawmakers introduced new frameworks that encouraged mainstream adoption and investment in these sectors, with regulatory protections that reduced institutional hesitation.

Ethereum, as the foundational layer of most DeFi protocols and stablecoin infrastructure, was the natural winner in this shift. The renewed confidence in the sector sent a strong signal to investors, and Ethereum’s price responded with aggressive upside.

DeFi and Stablecoins Anchor Ethereum’s Growth

Ethereum has long been the home for DeFi applications and the issuance of top stablecoins. As the U.S. regulatory environment turned favorable, capital flowed back into DeFi ecosystems, reviving user activity, total value locked (TVL), and network demand.

This increase in usage translated directly into greater on-chain activity and value accrual for Ethereum, reinforcing its position as the leading smart contract platform.

With Q4 now underway, market watchers are keeping a close eye on whether Ethereum can maintain this momentum or if profit‑taking will slow things down temporarily.