According to @CryptoMichNL, Bitcoin dominance (BTC.D) is in a downtrend comparable to Q3/Q4 2019, signaling greater upside potential for altcoins as BTC.D weakens (source: @CryptoMichNL on X, Sep 29, 2025). He adds that BTC dominance may see interim bounces, implying short-term volatility for altcoin pairs despite the broader altcoin-favorable structure (source: @CryptoMichNL on X, Sep 29, 2025).