According to Cas Abbé, today's cryptocurrency market saw significant sell-offs in altcoins, with most dropping between 10% and 15%. BTC dominance surged to its highest level since May 8, indicating a strong shift of capital into Bitcoin (BTC) while altcoins underperformed. The others/BTC ratio hit another cycle low, underscoring continued weakness in the altcoin sector. Traders should note that, with BTC still trading above $104,000, market momentum remains heavily concentrated in Bitcoin, suggesting caution for altcoin positions and increased focus on BTC trading pairs. (Source: Cas Abbé on Twitter)