What Is Bitcoin Dominance? How Is It Calculated?
Author: Lzzo Editor · Crypto · 6 min read · · Reviewed by the Lzzo.com editorial team
Short answer
Bitcoin dominance is Bitcoin's share of total crypto market value: its market value divided by the value of all crypto assets, times 100. In the illustrative example, $600 billion of Bitcoin in a $1,000 billion total gives 60%. The total depends on the data source, so figures differ, and the ratio does not show the direction of prices.
This guide gives no dominance percentage; the figures in the example are illustrative. The supply measures and the 2019 share come from the crypto-assets article in the European Central Bank's Economic Bulletin, Issue 5/2019 (April 2019 data); the 2022 and May 2025 shares come from the May 2025 Financial Stability Review. The Lzzo.com page status is as of 25 October 2026.
Key points
- Dominance (%) = Bitcoin market value ÷ total crypto market value × 100. The result is a percentage, not a price.
- The total depends on the assets and supply measure counted, so no single official figure exists.
- A falling ratio does not prove that altcoins are rising; it also falls when Bitcoin loses more value than other assets.
On this page
What does Bitcoin dominance show?
Bitcoin dominance is Bitcoin's share of the total market value of all crypto assets. A section of the European Central Bank's Financial Stability Review of May 2025 shows the same ratio in a chart, calling it Bitcoin's share of total market value. It shows how the market is divided between Bitcoin and other assets, not how valuable Bitcoin is on its own.
This guide gives no current percentage. The ratio has no single official source and depends on two figures, Bitcoin's market value and the total, which both change with price.
How is Bitcoin dominance calculated?
The calculation has two steps. First, each asset's market value is found: price × supply. The European Central Bank's 2019 bulletin states that this requires supply information, which can be measured in several ways. It defines circulating supply as the closest approximation of the units circulating in the market.
Second, Bitcoin's market value is divided by the total and multiplied by 100: dominance (%) = Bitcoin market value ÷ total crypto market value × 100. The total includes Bitcoin. In the European Central Bank's chart, stablecoins and more than 10,000 other assets appear as separate items within it.
Why does the total crypto market value differ by source?
No official body publishes the total, the denominator. Each data provider sets its own scope and method. The European Central Bank's 2019 bulletin lists some of these choices: the trading platforms included, trading volumes, the rule for the daily closing time and the treatment of low liquidity. It also notes that crypto prices are very scattered when no selection criteria are applied.
The supply measure also changes the result. The bulletin distinguishes circulating, total, maximum and inflation-adjusted supply. In the 2019 data, using maximum instead of circulating supply raised the total market value by about 20%. The 2025 report's chart groups the rest as “other”, covering more than 10,000 crypto assets tracked on more than 300 trading platforms.
Each choice changes the total and so the ratio. Two percentages are comparable only if they use the same scope and supply measure.
What does a fall in dominance not show?
The ratio has two variables: Bitcoin's value and the total. Dominance can fall when other assets rise faster than Bitcoin, when Bitcoin loses more value than the others, or when the total grows independently of Bitcoin, for example as stablecoin supply grows (if in scope). If Bitcoin and the total move at the same rate, the ratio does not change.
So a falling ratio does not prove that altcoins are rising, and a rising one does not prove that Bitcoin's price is rising. An altcoin is any crypto asset other than Bitcoin. The ratio shows how value is shared, not the direction of prices.
How has Bitcoin dominance changed over time?
The ratio is not fixed. The European Central Bank's May 2025 report states that Bitcoin's share of total market value rose from about 40% in 2022 to above 60% in May 2025. The same institution's 2019 bulletin puts Bitcoin at 50% of the total, using April 2019 data. The two calculations rest on different data sets.
These are figures for past dates and show neither today's value nor the future.
Does Lzzo.com show Bitcoin dominance?
As of 25 October 2026, no Lzzo.com page shows Bitcoin dominance. The crypto list has a market cap column, and the Bitcoin page shows its price with the observation time. The list does not cover the whole market, so a percentage computed from it is not an official dominance figure.
Worked example
Three scenarios: the ratio can change while Bitcoin's value stays the same
- Starting point: Bitcoin is worth $600 billion and all other assets total $400 billion, so the total is $1,000 billion.
- Dominance = 600 ÷ 1,000 × 100 = 60%.
- Scenario A: other assets rise to $500 billion while Bitcoin stays flat. The total is $1,100 billion, so 600 ÷ 1,100 × 100 = 54.5%. Bitcoin's value did not change, but the ratio fell.
- Scenario B: Bitcoin and the others both lose 10%, to $540 billion and $360 billion. The total is $900 billion, so 540 ÷ 900 × 100 = 60%. Equal falls leave the ratio unchanged.
- Scenario C: Bitcoin falls to $500 billion (−16.7%) while the others stay at $400 billion. The total is $900 billion, so 500 ÷ 900 × 100 = 55.6%. The ratio fell, but no altcoin rose.
This is an illustrative example: the figures are assumed and show neither an observed market value nor today's dominance.
Common mistakes and risks
- Treating one site's dominance percentage as the only valid value. Changing the scope or supply measure changes the ratio.
- Reading a falling dominance as a sign that altcoins are rising. In Scenario C, the ratio falls with no altcoin gain.
- Taking the ratio as a signal of price direction. It shows how value is shared, not where any price is heading.
- Comparing percentages from different dates without checking the data set behind each one.
- Confusing market value with unit price. Market value is price times supply, so a high-priced asset can hold a small share of the total.
Frequently asked questions
Does a high dominance mean Bitcoin is less risky?
No. The ratio does not measure risk. The European Central Bank's May 2025 report says that in 2024 Bitcoin prices were twice as volatile as gold prices and nearly three times as volatile as the S&P 500 index, and that Bitcoin remains a highly volatile, speculative investment.
What is altcoin season, and does dominance show it?
Altcoin season is an informal term, and the sources here give it no definition or threshold. A falling dominance alone does not show such a period, because the ratio also falls when Bitcoin loses value.
Are stablecoins included in the calculation?
It depends on the scope. In the European Central Bank's chart, stablecoins are a separate item of total market value. Leaving them out gives a different ratio.
Does Bitcoin's 21 million supply cap affect dominance?
According to bitcoin.org, Bitcoin's supply is limited to 21 million units. Market value, however, is price times supply, and the price changes, so the cap does not keep the ratio fixed.
Does the ratio change if it is calculated in Turkish lira?
No. When the numerator and denominator are in the same currency, the exchange rate is a common factor on both sides and cancels out.
Related pages on Lzzo.com
Related guides
- What Is Market Capitalization?What market capitalization measures, how the float-adjusted version used by index providers differs and what the figure does and does not say about a company.
- How to Read the Crypto Fear and Greed IndexHow to read the Bitcoin Fear and Greed Index: what feeds the 0-100 score, how to judge zone, direction and duration, and why it is not a signal to buy or sell.
- What Is a Stablecoin? How It Works, Types and RisksA stablecoin is a crypto token built to hold one US dollar. See how reserves and redemption work, the main designs, the risks and how rules treat them.
Lessons in this subtopic
Market data
- Fear and Greed Index
- Bitcoin dominance (current lesson)
Sources
- ecb.europa.eu
- bitcoin.org
Primary and official publications.