How to open a bank account in Portugal. We may receive compensation when you use Coinmama. Savings accounts with the highest interest rates but with conditions on minimum deposits and time periods that funds must stay in the account. It lets you buy bitcoins with bank transfer. A Portuguese bank account with higher interest rates for saving money but with easy access to funds. The best way of doing this is to arrange an appointment at the bank branch along with your child, taking the necessary ID for both yourself and your child. We may receive compensation when you use Coinbase Pro.