According to @rovercrc, the Altcoin Season Index printed 71 on Sep 10, 2025. source: @rovercrc By the BlockchainCenter Altcoin Season Index methodology, a higher reading means a larger share of the top 50 cryptocurrencies have outperformed BTC over the last 90 days, with 75 marking official Altseason. source: BlockchainCenter Altcoin Season Index A 71 reading indicates broad altcoin strength but not a confirmed Altseason, so traders are watching a potential break above 75 for confirmation of continued altcoin outperformance versus BTC. source: BlockchainCenter Altcoin Season Index

According to @MilkRoadDaily, the Altcoin Season Index is at 39, well below the 75+ threshold that marks a true altseason. According to @MilkRoadDaily, recent market strength has not spread across the wider altcoin market, with most alts still lagging BTC while ETH has broken out.