This paper covers topics and issues that have come from the emergence of cryptocurrency in economic terms. The purpose of this paper is not to explain technology in detail, but to give an economic perspective, while technology will be explained to the extent necessary to understand the economic issues involved. Blockchain is another innovation that has received violent reactions. In order to present as objective a picture as possible, the second chapter defines what money is, its meaning and functions - it provides the answer to what can be accepted as money. Chapter 3 presents an insight into the evolution of the payment system, and cryptocurrencies are the last stage, that is, the last solution to the needs of the society in terms of the payment or financial system. How cryptocurrencies are treated as money or property in most jurisdictions also raises the question of taxation, which is answered in Chapter Four. Given that cryptocurrencies are based on blockchain technology and the technology itself sets certain conditions through Chapter Five, the technology behind cryptocurrencies and the concepts that are important to the needs and direction of this paper are defined. In addition, as we talk about money, legislation and regulations are also unavoidable. For this reason, the regulatory framework and methods for the prevention of money laundering and terrorist financing are also considered in the paper. The sixth chapter gives a vivid account of how cryptocurrencies are not only some modern trend but a large number of people use them out of necessity, such as people in Venezuela, Zimbabwe and other countries with bad economic situations. The conclusion gives the final picture obtained from the research.