If 75% of the top 100 coins surpass $BTC in the last 90 days, it is Altcoin season. Remember that stablecoins like Tether and DAI, as well as asset-backed tokens like WBTC, stETH, and cLINK, are not included.

The $ETH has shown great strength in the last 3 days, including some coins rising over 25% like in the case of $AVAX .