4. Click “Credit/Debit Card”
You have a few different options for buying on Coinbase.
You can use a debit card, bank transfer, or wire transfer. (Previously credit card purchases were also possible, but despite the fact that this is still true according to Coinbase’s help pages, it’s currently not possible to add a credit card as a payment method.)
Debit card purchases are the fastest. As soon as you pay with your card, you will instantly have the Bitcoin in your account.
Bank transfers have lower fees, but it takes about five days before you receive your Bitcoin.