The only thing people should be aware of in this situation is that $2000 under your bed actually cost you $4000 or whatever since you are holding a balance on your credit card with high interest.
But the alternative, having a $2000 expense and no cash, would be a emergency. You can pay off $4000 in debt (and that doubling is probably hyperbole, but whatever), If you can handle small emergencies that will come up. Read Chapter 6 of Dave Ramsey's "Total Money Makeover" for a more thorough analysis.