On January 3, Coinmarketcap data showed that the Altcoin Season Index is now at 48, a sharp 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 Altcoin Season Index is a real-time indicator based on the performance of the top 100 altcoins relative to Bitcoin in the past 90 days. It is often used to determine whether the current cryptocurrency market is in an altcoin-dominated season.