The Altcoin Season Index has dropped to 20, marking a significant shift towards Bitcoin dominance. This index, which evaluates the performance of the top 100 cryptocurrencies against Bitcoin over a 90-day period, indicates that fewer than 25% of altcoins are outperforming Bitcoin. The recent five-point decline suggests a notable capital flow back to Bitcoin. This trend reflects broader market dynamics, including potential macroeconomic pressures and a risk-off sentiment among investors. The current index level underscores Bitcoin's growing strength in the market, although traders are reminded that the index is a lagging indicator and should be considered alongside other metrics when evaluating market positions.