Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

Is it possible for me to keep my credit card APR at 0% permanently?
No. The intro rate is a gambit by the bank - they accept losing money in the short term but expect to gain money in the long term when your intro is over and you (hopefully) start paying interest. There's not much in it for them if you never get around to paying interest. Same can be said for people who close the card after their intro period, but that's different - the bank is correctly expecting that most people won't bother.