The Ethereum ATH figure you quoted is not accurate, the true ATH could be averaged to $4,860, so it still has a long way to go to hit that level once more.

Indeed, Ethereum did better in recent months, but this may not necessarily mean it can sustain the tempo. It did similarly to what you expected when it edged higher than the March 2024 high of $4,092 in December when it hit $4,110. What did it do? It sold for several months before the current peak of $4,247. Ethereum has delayed too much, and the current buying is not a certainty of an altcoin season, but just following what Bitcoin pattern. You can check the daily chart.