Honestly, I believe bitcoin is better since the one you don't use your credit card so you don't lose you needed cash but instead the cash that you could easily earn back from mining. Plus, it's open to all ages, unlike credit cards.
Cryptocurrency is better than ordinary currency. It could be said better because the digital currency has many advantages such as the price that can be very high once in a short time, easy to use and much more. But between digital currencies with real currencies, of course, have advantages and weaknesses of each.