Altcoin Rotation or Cycle: Declining USDT Dominance Holds Key to Market Momentum

The cryptocurrency market has been experiencing a rotation phase, with Bitcoin dominance (BTC.D) facing pressure after its early May breakout to 61.2%. This trend is reflected in the Altcoin Season Index, which has jumped by over 10 points in less than 24 hours.

Historically, altcoin rallies have struggled to sustain momentum unless Ethereum (ETH) gains strength against Bitcoin (BTC). However, the ETH/BTC ratio has rebounded around 0.7% after four consecutive weeks of decline, indicating a potential shift in capital flow.

Declining USDT dominance is also playing a key role in this rotation. The stablecoin's dominance has fallen by 2.7% over the week, breaking below its critical early-February support level of 7%. This trend typically signals liquidity flowing out of risk assets and into safer havens.

On-chain data supports this trend, with USDT flows recording their largest exchange outflow in roughly three months. While this is typically a bearish signal, combined with the rising ETH/BTC ratio, it suggests that capital may be rotating into altcoins rather than exiting risk assets entirely.