Ever since I was about 18 years of age, I have had a credit card. The main reason, at least at first, was simply to build up a credit rating in case I ever needed a loan (which I ended up requiring when I went to university). Nowadays, I use my visa primarily for work expenses, since I tend to do a lot of traveling with my job. To that end, I probably spend close to $30,000 on my visa a year, a good portion of which comes from plane rides and hotel rooms when I'm on the road. I have no idea what my credit limit is on my visa, but last time I checked (which was a few years ago), there was enough ...