Which platform is best for cryptocurrency trading?

Coinbase offers the simplest onramp with strong security. Kraken provides lower fees and more advanced features. For serious crypto traders, Binance (where available) has the deepest liquidity and most trading pairs. Many stock brokers (Fidelity, Interactive Brokers) now offer crypto too. Key factors: fee structure, available coins, withdrawal options, and whether you can transfer to your own wallet.