You can swipe left or select the BTC symbol in the upper right-hand corner. 3. Select Buy, you can use the slider or swipe up to enter the amount you’d like to purchase. Press Buy BTC. 4. Enter your Cash pin or use your Touch ID for security. Press Confirm. Note: Before you can purchase Bitcoin (BTC) Cash App will pull money into your balance How to Buy Bitcoin - Investopedia Aug 02, 2019 · Bitcoin ATMs: Bitcoin ATMs act a bit like in-person bitcoin exchanges. Individuals can insert cash into the machine and use it to purchase bitcoin which is then transferred to a secure digital wallet.