The article briefly characterizes psychological impact of money existence in mentally regulated behaviour. The paper indicates explicit opinions on the effect of money on personality, especially on their moral characteristics. Within frequent social macro-changes of Slovak citizens, certainty-uncertainty is characterized as a personality feature. The author presents a more detailed description of the trust-distrust phenomenon, its determinants and influences on behaviour. He discusses experiences from international psychological research studies (mainly Austria). The explanation of euro currency perception (so called euro illusion, selective error) indicates consequences on consumer behaviour. Finally some Slovak peculiarities are mentioned.