As of now, there are several reputable Bitcoin exchanges operating in Zurich, Switzerland. These exchanges provide a platform for users to buy, sell, and trade cryptocurrencies like Bitcoin. Here are the top 10 Bitcoin exchanges in Zurich:

1. Bity: Bity is a popular cryptocurrency exchange based in Zurich that allows users to buy and sell Bitcoin and other cryptocurrencies with Swiss Francs.

2. Coinhouse: Coinhouse is another well-known Bitcoin exchange in Zurich that offers a user-friendly platform for trading cryptocurrencies.

3. Lykke: Lykke is a Swiss-based exchange that allows users to trade a wide range of cryptocurrencies, including Bitcoin, with low fees.

4. Bitcoin Suisse: Bitcoin Suisse is a leading cryptocurrency brokerage and exchange in Zurich that offers a variety of services, including Bitcoin trading, custody, and payment solutions.

5. Bitstamp: Bitstamp is a global cryptocurrency exchange that has a strong presence in Zurich, offering a secure platform for trading Bitcoin and other cryptocurrencies.

6. Kraken: Kraken is another popular cryptocurrency exchange that is available to users in Zurich, providing a wide range of trading pairs and advanced trading features.

7. Coinfinity: Coinfinity is a Swiss-based cryptocurrency exchange that allows users to buy and sell Bitcoin and other cryptocurrencies with Swiss Francs.

8. Coinify: Coinify is a Copenhagen-based cryptocurrency exchange that serves users in Zurich, offering a platform for buying and selling Bitcoin and other digital assets.

9. Luno: Luno is a global cryptocurrency exchange that is accessible to users in Zurich, providing a user-friendly platform for trading Bitcoin and other cryptocurrencies.

10. Bitpanda: Bitpanda is a well-known cryptocurrency exchange that operates in Zurich, offering a variety of services, including buying, selling, and trading Bitcoin and other digital assets.

These are some of the top Bitcoin exchanges in Zurich that provide a safe and secure platform for users to engage in cryptocurrency trading. Users should conduct their own research and due diligence before using any exchange to ensure the safety of their funds and transactions.