Bitcoin's share of total crypto market capitalization fell below 60% in the week ending 26 September 2026 even as Bitcoin's own price rose 3.3%, driven by seven altcoins — led by Litecoin's 23.7% gain — outperforming it simultaneously. U.S. spot Bitcoin ETFs took in about $2.4 billion the same week, the first time a sub-60% dominance reading has coincided with net institutional accumulation rather than an exit, unlike the three prior instances in 2017, 2021 and 2025.
Questions
It means Bitcoin makes up less than 60% of the combined market value of all cryptocurrencies. It can happen because money is leaving Bitcoin for altcoins, or because altcoins are gaining value faster than Bitcoin even while Bitcoin itself rises — the latter is what happened in the week ending 26 September 2026.
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