Here are the top 5 cryptocurrency exchanges that you can use to make money online:

1. Binance: Binance is one of the largest and most popular cryptocurrency exchanges globally. It offers a wide range of cryptocurrencies for trading and has a user-friendly interface.

1. Coinbase: Coinbase is a well-known cryptocurrency exchange that is beginner-friendly. It supports a variety of cryptocurrencies and provides a secure platform for buying, selling, and trading.

1. Kraken: Kraken is a reputable cryptocurrency exchange that offers advanced trading features and a wide selection of cryptocurrencies. It has a strong emphasis on security and compliance.

1. Bitstamp: Bitstamp is one of the oldest cryptocurrency exchanges and is known for its reliability and security. It supports a variety of cryptocurrencies and provides a user-friendly trading interface.

1. Bittrex: Bittrex is a popular cryptocurrency exchange that offers a wide range of cryptocurrencies for trading. It has a simple and intuitive user interface, making it suitable for both beginners and experienced traders.

Please note that investing in cryptocurrencies carries risks, and it's important to do thorough research and consider your risk tolerance before trading.