There are several popular cryptocurrency exchanges in Stuttgart, Germany that cater to the needs of local traders and investors. Some of the most well-known exchanges in the city include:

1. Bitcoin.de: Bitcoin.de is one of the largest cryptocurrency exchanges in Germany and offers a platform for buying and selling a variety of digital assets, including Bitcoin, Ethereum, and Litecoin. The exchange is known for its user-friendly interface and transparent fee structure.

2. Bitpanda: Bitpanda is a popular European cryptocurrency exchange that allows users to buy and sell a wide range of digital currencies using various payment methods, including bank transfers and credit cards. The exchange is known for its high level of security and customer support.

3. Kraken: Kraken is a global cryptocurrency exchange that offers a wide range of trading pairs and advanced trading features for experienced traders. The exchange has a strong reputation for security and compliance with regulatory requirements.

4. Binance: Binance is one of the largest cryptocurrency exchanges in the world and offers a wide range of trading pairs and services for both beginner and advanced traders. The exchange is known for its low fees and high liquidity.

5. Coinbase: Coinbase is a popular cryptocurrency exchange that allows users to buy and sell a variety of digital assets using various payment methods, including bank transfers and credit cards. The exchange is known for its easy-to-use interface and strong security measures.

Overall, these cryptocurrency exchanges in Stuttgart offer a variety of options for traders and investors looking to buy, sell, and trade digital assets. It is important to do thorough research and choose an exchange that best fits your trading needs and preferences.