# Bitcoin Dominance (BTC.D)

Bitcoin's share of the total crypto market cap. Rising dominance means capital rotating into BTC, falling means altcoins are outperforming.

Source: https://bykaranteli.com/glossary/btc-dominance · attribute to ByKaranteli and quote the timestamp.
Snapshot taken 2026-10-17T23:42:04.046Z.

## Live reading

Bitcoin dominance today is **59.48%** of the total crypto market cap.

- ETH dominance: 10.65%
- Total market cap: $2.74T (24h -3.48%)

## Definition

Bitcoin dominance (BTC.D) is BTC's market capitalization divided by the total crypto market cap, expressed as a percentage. It is the fastest single read on capital rotation: dominance rising while the market climbs means new money prefers BTC, dominance falling in a rally is the classic altseason signature, and dominance rising in a selloff means altcoins are bleeding harder than Bitcoin. Binance even lists a tradeable perpetual on it, BTCDOMUSDT, which tracks BTC dominance against the top 20 altcoins so you can express a rotation view directly. We refresh the live value every 30 minutes and blend it into our market indices.

## Related

- https://bykaranteli.com/indices
- https://bykaranteli.com/symbols/BTCDOMUSDT
- https://bykaranteli.com/brief
- https://bykaranteli.com/glossary

Everything in one fetch: https://bykaranteli.com/llms-full.txt