USDC (USD Coin) is a popular stablecoin pegged 1:1 to the U.S. dollar, making it a trusted base currency for many trading pairs. Coin pairs like BTC/USDC or ETH/USDC allow traders to move in and out of volatile assets while keeping funds stable. USDC is widely used on both centralized and decentralized exchanges due to its transparency, audited reserves, and regulatory compliance. It's ideal for hedging, earning interest in DeFi, or transferring value across platforms. Understanding how USDC pairs work can help manage risk and improve trading efficiency in the ever-changing crypto market.