The altcoin market has an important indicator: 'Bitcoin Market Share'

Rising Share: Funds flow into Bitcoin, Bitcoin absorbs liquidity, altcoin bear market

Falling Share: Funds flow out of Bitcoin / Funds flow into altcoins, altcoin bull market

In March 2017, the share dropped from 80% to 30%, triggering an altcoin bull market

In January 2021, the share dropped from 70% to 40%, triggering an altcoin bull market

In December 2024, the current share is 56%, having fallen below the rising channel