According to @CoinMarketCap, BTC dominance has not dipped below 50% in 2025, ended 2024 at 56.7%, and currently stands at 58.8% as of Dec 8, 2025 (source: CoinMarketCap tweet on Dec 8, 2025). Based on CoinMarketCap’s dominance metric, this implies altcoins collectively account for about 41.2% of total crypto market capitalization at present, indicating a larger market share concentration in BTC relative to altcoins for 2025 (source: CoinMarketCap dominance data on Dec 8, 2025).