How to buy Bitcoin banana?

Excuse me, but could you please clarify your question? Are you asking about how to buy Bitcoin, or is there a specific product or service called "Bitcoin banana" that you're interested in? If your question is about purchasing Bitcoin, it's a digital currency that can be bought and sold on various online exchanges. To buy Bitcoin, you would typically need to create an account on a reputable exchange, verify your identity, and then fund your account using a bank transfer, credit/debit card, or other payment method. Once your account is funded, you can then use it to buy Bitcoin at the current market price. However, if you're referring to a product or service called "Bitcoin banana," I'm not familiar with it and would recommend doing some research to find out more about it before making any purchases.