It is very good to bind debit card for automatic repayment, which can avoid paying more interest and late fees because of missing the normal repayment period, and will not affect the enjoyment of the longest interest-free period, because banks generate bills based on the billing date, and automatic repayment only deducts the bill amount. Look at your own needs, you don't have to worry about safety. As long as you apply for a savings card, the balance is enough and it will be automatically transferred when it expires, just like paying utilities. In addition, banks that have nothing to do with withdrawals must see that you have at least 50,000 large deposits and will not put 50,000 current accounts. Hope to adopt.