Guernsey, a British Crown dependency located in the English Channel, has seen a growing interest in cryptocurrency trading in recent years. As a result, there are several popular cryptocurrency exchanges that cater to the residents of Guernsey. Some of the most popular cryptocurrency exchanges in the city of Guernsey include:

1. Binance: Binance is one of the largest cryptocurrency exchanges in the world and offers a wide range of trading pairs for various cryptocurrencies. It is known for its low trading fees and user-friendly interface, making it a popular choice among traders in Guernsey.

2. Coinbase: Coinbase is a popular cryptocurrency exchange that is known for its ease of use and high level of security. It offers a wide range of cryptocurrencies for trading and is suitable for both beginners and experienced traders in Guernsey.

3. Kraken: Kraken is another popular cryptocurrency exchange that offers a wide range of trading pairs and advanced trading features. It is known for its high level of security and regulatory compliance, making it a trusted choice for traders in Guernsey.

4. Bitstamp: Bitstamp is one of the oldest cryptocurrency exchanges in the world and offers a range of trading pairs for various cryptocurrencies. It is known for its high level of security and reliability, making it a popular choice among traders in Guernsey.

5. eToro: eToro is a social trading platform that allows users to trade a wide range of financial instruments, including cryptocurrencies. It is known for its user-friendly interface and social trading features, making it a popular choice among beginners in Guernsey.

Overall, these are some of the most popular cryptocurrency exchanges in the city of Guernsey, offering a wide range of trading options for residents who are interested in trading cryptocurrencies. It is important for traders to conduct their own research and choose an exchange that meets their specific needs and preferences.