The topic of this paper is the analysis of the cryptocurrency market. In a way, cryptocurrencies represent a financial revolution, these virtual currencies have gained enormous popularity in the last ten years and are increasingly becoming a part of everyday life. Ever since their first appearance, cryptocurrencies have been a controversial topic among the public. While for some they are an opportunity to make serious money, others think they are a scam and cannot be trusted. It is impossible to ignore the huge impact of these seemingly non-existent currencies that are changing the way people look at money every day. The aim of this paper is to show the origin of cryptocurrencies, their progress and an extremely unstable market where even the greatest experts cannot predict what will happen next. In addition, the paper presents the positive and negative sides of cryptocurrencies and describes some of the most famous cryptocurrencies along with their mode of operation. Also shown are the controversies that have followed digital currencies over the years. After years of talking about cryptocurrencies as the currency of the future, that future has arrived.