Sourced crypto guides
What Is Bitcoin Dominance (BTC.D)?
Bitcoin dominance is Bitcoin's share of the total crypto market capitalization. When dominance rises, capital is typically flowing into BTC; when it falls, it may be rotating into altcoins — but it is not a standalone buy/sell signal.
How dominance reflects market cycles
In risk-off periods investors move to the most liquid, largest asset (BTC) and dominance rises. As risk appetite grows, capital spreads into altcoins and dominance declines — which is why it is also read as an "altcoin strength" gauge, alongside this site's ETH/altcoin indicator.
What happens while dominance rises?
When BTC dominance rises, altcoins tend to lose value against BTC; alt/BTC pairs can fall even if BTC price is flat. Selectivity in altcoin positions should increase during these periods.
- Read dominance and BTC price together.
- Rising dominance can limit altcoin rallies.
- Check the BTC pair, not only the USDT pair.
Is falling dominance "altseason"?
Falling dominance is consistent with capital entering altcoins, but not every decline is an altseason. New coin supply, stablecoin growth and a single large altcoin move can mechanically push the ratio down.
- Is the decline driven by altcoin buying or supply effects?
- Is participation broad or limited to a few coins?
- Evaluate dominance with price and volume.
Checklist
- Over which timeframe is the dominance trend measured?
- What do BTC price and dominance say together?
- Do altcoin volumes support the dominance move?
- Is the indicator not being used as a sole decision input?
Frequently asked questions
Dominance alone is not a reason to buy; coin selection, volume and technical structure must be reviewed separately.
It is the ratio of Bitcoin market cap to total crypto market cap; small differences may appear between data providers.