According to @cas_abbe, strength in the ETH/BTC pair rather than ETH/USDT drove the Q2–Q3 altcoin rally, making the current ETH/BTC pump a constructive altseason indicator for altcoin rotation, source: X post by @cas_abbe on Dec 4, 2025 https://twitter.com/cas_abbe/status/1996485301926318311. @cas_abbe adds he is not expecting a 100%–200% move in ETH/BTC but sees a 20%–25% rally as more realistic, implying a favorable setup for altcoin outperformance if ETH continues gaining versus BTC, source: X post by @cas_abbe on Dec 4, 2025 https://twitter.com/cas_abbe/status/1996485301926318311.