According to TechFlow, on January 3, Coinmarketcap data showed that the altcoin seasonal index was currently at 48, a significant drop from last month's peak of 86.
The index shows that in the past 90 days, about 48 of the top 100 cryptocurrencies by market value have outperformed Bitcoin. The CMC Cryptocurrency Alt Season Index is a real-time indicator based on the performance of the top 100 altcoins relative to Bitcoin over the past 90 days. It is often used to determine whether the current cryptocurrency market is in an altcoin-dominated season.