According to @Matt_Hougan, strength in Ethereum (ETH) and Solana (SOL) is mutually reinforcing and shifts focus from zero‑sum competition to expanding overall crypto market value. Source: @Matt_Hougan on X, Dec 4, 2025. Large‑cap crypto assets including ETH and SOL exhibit persistent positive return correlations and shared liquidity regimes, supporting spillover rallies across L1 ecosystems. Source: Kaiko Research, Market Correlations in Crypto, 2024. When ETH spot/perp volumes and market depth expand, sector beta typically rises and alt‑L1s capture incremental flows, making ETH momentum a practical signal for SOL exposure and vice versa. Source: Kaiko Research 2024; Coin Metrics, State of the Network 2024. Actionable setup: track 30–90 day ETH–SOL rolling correlation, funding rates, perp basis, and 1% order‑book depth to time sector rotation and pair trades while managing slippage. Source: Deribit Insights 2024; Kaiko Liquidity Metrics 2024.