? about Available credit on CC

[britfish]

My dad was telling me that sometimes it is bad to have a lot available credit open to you. He was saying that since I have three major credit cards I should lower some of the available credit since some of my limits are pretty high. I would like to keep one with a large credit limit but should I lower the others?
Thank you for any insight.

 

[Befferk]

It's about your percentage of usage. If you carry a $2,000 balance, and your total credit line is $10,000, it will be better for you than if you only had $5,000 for a total credit line. I know some creditors may look at it negatively if you have too much credit available to you, but I've never had that problem, and between my credit cards, I have an insanely high total amount of credit available to me. I also have a high credit score. It's also not a good idea to close credit cards you've had for a long time. The longer you have a credit card, the better it is because part of your score is based on your length of credit history.