Chicago, known for its vibrant financial and technology sector, is also home to several reputable Bitcoin purchase platforms. These platforms offer easy and secure ways for residents of Chicago to buy and sell Bitcoin. Here is a ranking of the top 10 Bitcoin purchase platforms in Chicago:

1. Coinme: Coinme is a Bitcoin ATM operator with several locations in Chicago, making it easy for users to buy Bitcoin with cash or debit card.

2. Coinbase: Coinbase is a popular cryptocurrency exchange that allows users to buy Bitcoin using various payment methods, including bank transfer and credit card.

3. Gemini: Gemini is another well-known cryptocurrency exchange that offers a secure and regulated platform for buying and selling Bitcoin.

4. Kraken: Kraken is a global cryptocurrency exchange that provides a wide range of trading options for Bitcoin and other cryptocurrencies.

5. LocalBitcoins: LocalBitcoins is a peer-to-peer Bitcoin exchange that allows users to buy and sell Bitcoin directly with each other.

6. Bitstamp: Bitstamp is one of the oldest cryptocurrency exchanges in the industry, offering a reliable platform for buying and selling Bitcoin.

7. Binance: Binance is a popular cryptocurrency exchange that offers a wide range of trading pairs for Bitcoin and other cryptocurrencies.

8. Bitfinex: Bitfinex is a cryptocurrency exchange known for its advanced trading features and high liquidity for Bitcoin trading.

9. BitMEX: BitMEX is a derivatives exchange that offers margin trading for Bitcoin and other cryptocurrencies.

10. Paxful: Paxful is a peer-to-peer Bitcoin marketplace that allows users to buy and sell Bitcoin using a wide range of payment methods, including gift cards and online wallets.

Overall, these Bitcoin purchase platforms in Chicago offer a variety of options for users to buy and sell Bitcoin securely and conveniently. Whether you are a beginner or an experienced trader, there is a platform on this list that will suit your needs.