With the rapid development of contemporary technology, people are not only satisfied with the economic benefits brought by the traditional financial industry. In 2009, a currency incorporating blockchain Bitcoin was born, thus kicking off the cryptocurrency trend. In this paper, the historical development and status of the cryptocurrency market will be discussed first, including an introduction to the cryptocurrency market as a whole and a detailed description of the major currencies. Secondly, it discusses the various cryptocurrency disruptions in the year 2021, with musk as the key opinion leading the cryptocurrency price trends. Then, it analyzes the factors that affect the value of cryptocurrencies, including supply and demand, public perception and relationship with other currencies, and the value of cryptocurrency investments and future price trends. The regulation of cryptocurrencies is also reviewed. Policies from different countries is firstly discussed, and following this article talks about the impact of different regulation policies on the cryptocurrency market. The prediction for the future regulation tendency is also included. In addition, this study focuses on the case of the Republic of El Salvador's adoption of bitcoin as legal tender, feasibility, risks, and advantages and disadvantages of bitcoin as legal tender.