In the new digital age, with the rapid development of electronic devices and the Internet, the transformation of money is also inevitable. Cash and credit card payments are beginning to be replaced by mobile, online payment methods. Advances in technology have hastened the spread of cryptocurrencies and created digital currencies. However, this development and the emergence of cryptocurrencies began decades ago. Although decentralized finance does not seem to be a substitute for the traditional financial system, it is unlikely that it will become an official currency in the future, but emerging digital currencies could play this role. The aim of this study is to present the background to the emergence of digital currencies and to seek answers to the challenges it will face in the future to become a full-fledged currency.