Crypto metric signals altseason as Bitcoin market-cap share stalls below 60%

Bitcoin’s (BTC) rise to $86,000 this week has dragged altcoin markets higher as the industry’s market cap reclaimed $3 trillion.Key points:Glassnode’s Altcoin Cycle Signal printed a new “altcoin season” signal as it reached 81.25 of a maximum 100.Bitcoin dominance, BTC’s market share among crypto assets, failed to break 60% and has stayed rangebound over the past month.On Monday, both Bitcoin and Ether ETFs saw their highest daily inflows since October 2025.Altcoin Cycle Signal flips to favor altcoins over BitcoinA proprietary metric from onchain analytics platform Glassnode has delivered a new “altcoin season” signal this week on the back of recent crypto market upside.Glassnode’s Altcoin Cycle Signal, which compares the market cap of the 250 largest cryptocurrencies relative to Bitcoin, has flipped to favoring altcoin outperformance. Altcoin season — known in crypto circles as ‘altseason’ — refers to periods when altcoins outperform Bitcoin in combined market-cap growth. Glassnode’s metric delivers “altcoin season” signals when relative growth in market cap of the 250 largest altcoins, excluding stablecoins, is temporarily stronger than that of Bitcoin. The exact methodology behi...