Here are some common coin pairs for Bitcoin (BTC) ¹ ² ³:

- *BTC/USDT*: Bitcoin paired with Tether, a stablecoin pegged to the US Dollar. This pair is popular due to its high liquidity and wide use in trading.

- *BTC/USD*: Bitcoin paired with the US Dollar. This pair is important for traders who want to measure the value of Bitcoin against government currencies.

- *BTC/ETH*: Bitcoin paired with Ethereum. This pair allows traders to speculate on the relative performance of ETH compared to BTC.

- *Other pairs*: BTC can also be paired with other cryptocurrencies like Litecoin (LTC), Dogecoin (DOGE), Cardano (ADA), and Stellar (XLM).

These pairs can be categorized into ¹:

- *Crypto-Crypto Pairs*: Involving two cryptocurrencies, like BTC/ETH.

- *Crypto-Fiat Pairs*: Combining a crypto with a fiat currency, like BTC/USD.

- *Crypto-Stablecoin Pairs*: Exchanging a crypto for a stablecoin, like BTC/USDT.