According to Coinmarketcap data, the Altcoin Season Index is now at 13, setting a yearly lowest level since September 3, 2024, a sharp drop from 43 points last month. The altcoin index has continued to decline since its annual high of 87 points on December 4, 2024. The index shows that only 13 of the top 100 cryptocurrencies in the past 90 days have surpassed Bitcoin's gains in the top 100 cryptocurrencies in the past 90 days.