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Altcoin market cap jumps 33 percent as signal points to altcoin season

A signal suggesting the altcoin market has entered a period of relative strength versus bitcoin has emerged. Cointelegraph reported that Glassnode’s altcoin cycle indicator flashed a new altseason signal this week, with its seven-day average at 81.25 on a 0-100 scale. Altcoin market capitalisation rose to $1.19 trillion, up 33% since Aug. 19, while bitcoin dominance edged up slightly. Spot bitcoin and ether ETFs recorded their biggest daily inflows since October 2025.