Coinbase users in nearly any country can convert between cryptocurrencies, but cannot always convert local currency into crypto. Coinbase: the simple, safe way to buy, manage and sell your cryptocurrency. You will not be charged for these transactions. So, move your bitcoins into a wallet you control after you buy. The app will now generate 2FA codes for Coinbase that change every few seconds. Bitcoin is just a small piece of what they do. The most popular payment methods for Coinbase customers are buying with a credit card or debit card , and also using a bank transfer.