Ethereum's price trend in the second half of 2025 could significantly impact the DeFi ecosystem. A bullish trend, potentially driven by upgrades like Pectra or increased institutional adoption via ETFs, may boost DeFi activity, increasing total value locked (TVL) and user participation as higher ETH prices enhance collateral value. Conversely, a bearish trend could strain DeFi protocols, triggering liquidations in lending platforms and reducing TVL, especially if leveraged positions unwind rapidly. Posts on X suggest Ethereum’s price volatility, tied to DeFi’s prosperity, amplifies these effects. Overall, a stable or rising price could solidify Ethereum’s dominance in DeFi, while a decline might shift focus to competing blockchains.