Now buying and selling bitcoin trough cash app is also available. You can find the solution how to buy and sell cash app bitcoin here by referring this link cash app bitcoin.
Bitcoin is about sending cash digitally, It can be in a mobile or computer it depends upon the customer.
Cash app is a payment method where the money is moved from one person to another in an online transaction. Now, the good news is the cash app purchases the bitcoin and you can withdraw bitcoin from the cash app very easily.