Bitcoin Dominance

Bitcoin Dominance is Bitcoin's market capitalization as a percentage of the total cryptocurrency market cap. If BTC's market cap is $2 trillion and total crypto market cap is $3.3 trillion, dominance is roughly 60%.

The number is widely tracked as a sentiment indicator:

• Dominance rising typically means capital is flowing toward Bitcoin and away from altcoins. Happens during bear markets (flight to relative quality), early bull markets (Bitcoin moves first), and macro stress events.
• Dominance falling typically means capital is rotating into altcoins. Happens during late-cycle euphoria, alt seasons, and periods when retail speculation is high.

Historical context:

• 2013: Dominance ~95%. Almost no significant altcoins existed.
• 2018 ICO peak: Dominance briefly fell below 35%. The first time altcoins collectively rivaled Bitcoin.
• 2020-2021 cycle: Dominance oscillated between 40-70%.
• 2024-2026: Generally trending higher (~50-65%) as the post-FTX wash-out reduced altcoin enthusiasm.

A few honest caveats about the metric:

• "Total crypto market cap" is fictional in detail. Many altcoins have huge insider allocations or near-zero liquidity. Their market caps are paper numbers. Bitcoin's market cap is also paper, but the underlying asset is at least trading in real liquidity globally.
• Dominance is path-dependent. What counts as "the rest of crypto" today (including stablecoins like USDT/USDC) is different from what counted in 2017. Comparisons across long time horizons are noisy.
• Bitcoin maximalists will argue dominance should always be ~100% because everything else is, in some technical or moral sense, not money. That's a view; the metric doesn't take a position.

For traders, dominance is a sentiment dial. For long-term Bitcoin holders, it's mostly a curiosity.