The main goal of this diploma thesis is to explore the area of virtual currency Bitcoin and assess the use of this currency in today's economy. Thesis first mentions the cryptocurrency market, the technology and other altcoins. It further analyzes the cryptocurrency Bitcoin in detail, its foundation, history and mining. The text also explores the volatility of this currency in the recent years, the question of regulation by states and technological threats to the network. In the final chapter diploma thesis examines the possibilities for individuals to obtain this currency and the use of Bitcoin by enterprises.

The main objective of this diploma thesis is to find out the potential of digital currencies to replace contemporary fiat currency. Specifically, the thesis is focused on cryptocurrency Bitcoin, which currently has the highest market value. The thesis is divided into three main chapters. The first one focuses on money itself and its function, not only today but also throughout the history. Second chapter explains substance and functioning of Bitcoin, as well as its role in the current monetary system. Likewise the question of regulatory measures and competition of altcoins is being examined. Final part analyses the future of digital currencies and it compares pros and cons of Bitcoin and money we use today. Furthermore, it is discussed whether Bitcoin is the next bubble in the financial market. In the end, main problems which Bitcoin and other cryptocurrencies deal with are mentioned and a possible future development is outlined.

The subject of the thesis is the parallel digital economy created around the monetary innovation called Bitcoin and the interaction between this technology and its users. Bitcoin is a new kind of digital money and a payment system. Transactions are cryptographically verified by users and subsequently recorded in a publicly distributed account book called blockchain. Bitcoin, as an open-source project, has created a worldwide community of Internet-connected users who are further transforming this cryptocurrency by their specific use. Ethnographic research took place during the meetings of the community surrounding the Prague place called Parallel Polis in the period of years 2017-2018 and was subsequently extended to the "online" world. Bitcoin forms the intersection between technology and the economy, and therefore emphasis is placed on exploring the dynamics that this complex phenomenon creates. The work examines the social practices that actors are constantly shaping on the basis of their various motivations through their participation in Bitcoin and the complex ideas connected with it. It examines the visions, attitudes and practices of the "bitcoiners", who support the functioning of this system and allows its very own existence. These ideas are characterized by certain paradoxes and dilemmas...

Bitcoin and other cryptocurrencies are getting into common usage more and more frequently. Unfortunately this spread is connected with attempts to misuse their principles for personal benefit. The goal of this thesis is to explain the main principles of using bitcoin in relation to the internet identity. This connection is represented by two sources in the thesis: the first is a bitcoin blockchain, the second is the sum of various user profiles used in discussion forums and similar websites. The aim is to create and explain the process how to, by using the combination of this two sources, reveal the identity of a human using cryptocurrencies for payment (from a private person point of view). First, methods used for extraction of correct and useful data from the blockchain and internet profiles must be developed to be able to mine data from the joint database, merging into a full user profile containing personal data. Results of this investigation are extended by the rules of preserving anonymity on the internet, containing both technological and behavioural measures avoiding a share of personal data. The end of this thesis explains possible attack vectors that might be used for compromising cryptocurrencies. The methods of searching of the internet identity are a useful tool for facing these attacks.

El presente trabajo de investigación tiene como principal objetivo el analizar el uso del Bitcoin como medio de pago en el Perú. El bitcoin es un moneda digital o criptomoneda esta es intangible y virtual que sirve como medio de intercambio de bienes y servicios como cualquier otra cualquier moneda del mundo donde esta sea aceptada, esta como tal no cuenta con un número de serie u otro mecanismo que permita rastrear a los vendedores y compradores que emplean esta divisa electrónica . Con respecto a la metodología empleada, se escogió un enfoque cualitativo, de tipo aplicada, de diseño no experimental y de nivel exploratorio; limitando a analizar la opinión de seis docentes especialistas en las materias de economías, finanzas y de derecho, de cinco usuarios y cinco no usuarios de Bitcoin con el propósito de obtener respuesta al fenómeno de estudio. La técnica empleada es la entrevista y como instrumento la guía de entrevista de adaptación propia validada por expertos, posteriormente la información obtenida fue revisada e interpretada, donde se llegó a la conclusión que el uso del Bitcoin como medio de pago en el Perú es nulo y no viable de momento debido a una gran serie de factores como la falta de regulaciones monetarias y legales, de igual modo la no necesidad por parte de los peruanos de colocar en circulación un nuevo medio de pago como lo es el Bitcoin. / The main objective of this research work is to analyze the use of Bitcoin as a payment method in the Perú. Bitcoin is a digital currency or cryptocurrency this is intangible and virtual that serves as a means of exchanging goods and services like any other any currency in the world where it is accepted, it as such does not have a serial number or other mechanism that allows track sellers and buyers using this electronic currency. Regarding the methodology used, a qualitative approach was chosen, of an applied type, with a non-experimental design and an exploratory level; limiting to analyze the opinion of six professors specialized in the subjects of economics, finance and law, of five users and five non-users of Bitcoin with the purpose of obtaining a response to the study phenomenon. The technique used is the interview and as an instrument the self-adapted interview guide validated by experts, subsequently the information obtained was then reviewed and interpreted, where it was concluded that the use of Bitcoin as a means of payment in Peru is null and void and not viable at the moment due to a number of factors such as the lack of monetary and legal regulations, as well as the lack of need for Peruvians to put into circulation a new means of payment such as Bitcoin.

The main aim of this diploma thesis is to find out how the Czech printed media face relatively new and complex phenomenon that emerged in the monetary sphere - virtual currency bitcoin. Through the means of quantitative content analysis, all printed titles showing relevant references to bitcoin between the years 2009 and 2016 were examined. The thesis is divided into several chapters. The theoretical part contains different media concepts dealing with the agenda-setting, the creation of a media portrayal and the construction of social reality through mass media. From a theoretical point of view, the cryptocurrency bitcoin was also subject for detailed analysis. The following methodological part of the thesis introduces the main objective of research, research questions and research design. The analytical part provides a clear overview of the results obtained, then interpreted and compared with predetermined hypothesis. The overview of collected findings about the media image of the virtual currency bitcoin in the Czech press are summarized in the conclusion. The thesis is the first paper to deal with the issues of the virtual currency bitcoin from the point of view of media discourse in the Czech Republic, and its ambition was to gather completely new information on this topic.