Before you can use a Bitcoin ATM, you should know what it is and how it works. A Bitcoin ATM is a simple machine that purchases and sells bitcoins. To use it, you must have a crypto wallet. A crypto wallet is a software application that keeps track of your bitcoin and other cryptocurrencies. You can use a web-based crypto wallet or a hardware device. To use a Bitcoin ATM, you must first create an account and provide the information requested. You will then need to create an alphanumeric code or QR code, which is required for the transaction.