The dissertation called Economic and Psychological Aspects of a Consumer's Behaviour and Decision-Making is dedicated to a consumer's behaviour and decision-making in economic and financial issues from the perspective of classic economy, psychology and behavioural economy. The theoretical part describes the expected utility theory and psychological findings on one hand, and presents the so called Prospect Theory and systematic biases on the other hand. The practical part comprises a research. Mission of the questionnaire survey is to find out whether behaviour and decision-making are rational and correspond with the classic economy theory or whether consumers behave irrationally and verify presumptions of behavioural economy.

Digital currencies represent complementary alternatives to fiat money in the conventional mental models of exchange. Blockchain, as the underlying technology of Bitcoin, holds a potential to influence a peer-to-peer exchange in the perspective of trust and ownership. The underlying technologies of digital currencies may be part of concepts, where designers have a possibility to define their own exchange articles for specific needs of the exchange. The ambition of this report is to illustrate the possibilities for the initiation of a peer-to-peer exchange with use of the underlying technologies beyond Bitcoin. The explorative approach provided me material for the retrospective reflection to achieve this ambition. The thesis project consisted three iterations, one experiment, and a literature overview. The main conceptual work illustrates the result of explorative research, where blockchain ensures trust between participating parties. This ecosystem uses the principles of sharing economy for initialisation of exchange within the community. This concept demonstrates potential opportunities for future transactions, in which the exchange article replaces fiat money.