Well for me its not worth it applying for one, mainly because it affects your credit score, too much credit is not always good

I pay down my credit cards balance to 0 every month, I never carried a balance to the next month and never plan on doing it, always paid my credit card to bring it to a 0 balance a week or two after my purchase, spend what you have.
Usually I have money to just use my debit card and pay for everything, the reason I use my credit card is so I keep building up my credit score, other than that, I have no real use for it.