I think it should be a lot among young people. I have got two cards myself, and all my friends have more than one. I used to feel afraid to get a card, but now I have used it for two years, and I find it very convenient. Now I swipe my card for everything I buy, and I can repay it 5 days later after spending, and I don't charge fees or interest. It's very useful for people who are short of money sometimes.