Ethereum Jumps 31% in a Week, Renewing Altcoin Season Talk

Ethereum has climbed about 31% over the past seven days to roughly $2,495, reigniting speculation that the market could be entering a broader altcoin rotation. Participation metrics, though, still fall short of a confirmed "altseason". BlockchainCenter's Altcoin Season Index is at 43, well below the 75 level typically used to signal an altcoin season. Bitcoin continues to account for more than 59% of total crypto market value, indicating capital has not meaningfully rotated away from BTC. Ethereum's share stands at about 11.4%. The rally is not limited to ETH. XRP is up around 49% over the same seven-day span, while Zcash has gained roughly 64%, pointing to selective strength across major alts. Still, common definitions require breadth, not just a handful of leaders. CoinMarketCap describes an altcoin season as a period when at least 75% of the top 100 cryptocurrencies outperform Bitcoin over 90 days; BlockchainCenter applies a similar 75% threshold to the top 50. Derivatives and sentiment gauges are turning more supportive. Glassnode said on August 24 that 85% of altcoins were showing funding rates above their mean, calling it the highest reading for that metric since Bitcoin was trading at all-time highs. The firm noted that such conditions can persist for weeks during an altcoin season. BitMEX co-founder Arthur Hayes has framed Ethereum as the potential catalyst for the next leg higher. In an interview with Laura Shin, Hayes said ETH is his largest crypto position outside Bitcoin and argued that failing to reclaim its 2021 peak leaves room for catch-up. He said a break above $3,000 could open a move toward $5,000. Hayes has also suggested Ethereum could outperform major assets in a liquidity-driven recovery and help pull Bitcoin dominance down toward 40%, aligning with the typical rotation pattern in which Bitcoin strengthens first, Ethereum follows, and capital then spreads to smaller tokens. For now, the data points to an early-stage rotation rather than a full altcoin season. Ethereum's momentum and improving derivatives positioning are supportive for bulls, but breadth indicators remain below confirmation levels.