The cryptocurrency market is witnessing a notable shift as altcoin rotation gains momentum, marked by a decline in Bitcoin dominance (BTC.D) and a rebound in the ETH/BTC ratio. Bitcoin dominance has faced four consecutive days of downward pressure after reaching 61.2% in early May. Concurrently, the Altcoin Season Index surged by over 10 points within 24 hours, indicating a potential shift from Bitcoin to altcoins. The ETH/BTC ratio has rebounded by approximately 0.7% following a four-week decline, suggesting a possible expansion of the rotation beyond Bitcoin. This development is accompanied by a significant drop in USDT dominance, which fell 2.7% over the week, breaking below the 7% support level. The decline in USDT dominance, coupled with substantial USDT outflows from exchanges, indicates a shift of capital into altcoins rather than a complete exit from risk assets. These trends suggest a potential divergence from previous short-lived altcoin cycles, with the broader altcoin market poised for growth if current conditions persist.