Here's a list of popular cryptocurrencies and some common.  pairs:

Cryptocurrency Names:

Bitcoin (BTC): The first and most well-known cryptocurrency.

Ethereum (ETH): A blockchain platform with its own native cryptocurrency.

Solana (SOL): Known for its high speed and scalability.

Binance Coin (BNB): The native cryptocurrency of the Binance exchange.

XRP (XRP): Developed by Ripple, a payment network.

USD Coin (USDC): A stablecoin pegged to the US dollar.

Tether (USDT): Another popular stablecoin, also pegged to the US dollar.

Cardano (ADA): A blockchain platform with its own cryptocurrency.

Dogecoin (DOGE): A meme-inspired cryptocurrency.

Polkadot (DOT): A blockchain networking platform.

Avalanche (AVAX): A fast and scalable blockchain platform.

Litecoin (LTC): A cryptocurrency that was inspired by Bitcoin.

Ondo (ONDO): A cryptocurrency related to DeFi finance. 

Common Trading Pairs:

BTC/USD: Bitcoin trading against the US dollar.

ETH/USD: Ethereum trading against the US dollar.

SOL/USD: Solana trading against the US dollar.

BNB/USD: Binance Coin trading against the US dollar.

XRP/USD: XRP trading against the US dollar.

USDC/USD: USD Coin trading against the US dollar.

USDT/USD: Tether trading against the US dollar.

ADA/USD: Cardano trading against the US dollar.

DOGE/USD: Dogecoin trading against the US dollar.

DOT/USD: Polkadot trading against the US dollar.

AVAX/USD: Avalanche trading against the US dollar.

LTC/USD: Litecoin trading against the US dollar.

ONDO/USD: Ondo trading against the US dollar. 

These are just a few examples, and there are many other cryptocurrencies and trading pairs available on various crypto exchanges.