The $BTC coin pair typically refers to a trading pair involving Bitcoin (BTC) on a cryptocurrency exchange. In simple terms, it means you are buying or selling another cryptocurrency in relation to Bitcoin.

Here's how it works:

A coin pair always has two cryptocurrencies: one you're trading with (the quote currency), and one you're trading for (the base currency).

In a BTC pair, BTC is usually the quote currency. This means you're using BTC to measure or trade the value of another coin (e.g., ETH/BTC).

Example:

ETH/BTC = How much BTC you need to buy 1 ETH.

If ETH/BTC = 0.065, that means 1 ETH costs 0.065 BTC.

Why it's important:

BTC is one of the most liquid and dominant assets in crypto, so many coins are paired with it.

BTC pairs are commonly used in altcoin trading—especially on platforms that don’t use fiat currencies like USD or EUR.

In summary:

A BTC coin pair lets you trade other cryptocurrencies using Bitcoin as the standard. It’s a way to express the value of altcoins in terms of BTC rather than in dollars or other fiat currencies.