<p>Individual investors dominate the rapidly growing US$2.73 trillion cryptocurrency market. Cryptocurrencies are highly controversial because of their real and expected ethical and environmental impacts. Surveying 1500 individual investors in Denmark, Finland, and Sweden, we reveal that beliefs about the ethical, sustainability, and environmental implications of cryptocurrencies influence current and intended ownership. While future participation intentions are predicated on currently owning cryptocurrencies, this relationship is moderated by investors’ ethical and sustainability perceptions. Cryptocurrency knowledge and education significantly moderate the relationship between belief and intended ownership. Furthermore, we identify notable gender differences: ethical beliefs more strongly mediate future holding intentions among men, while sustainability perceptions have a greater mediating effect among women. In line with dual-process theory concepts, previous cryptocurrency trading experience and knowledge further reinforce this relationship. Our research has broad relevance to stakeholders, including policy makers, particularly in light of the current debate about Fintech’s role in fostering financial inclusion and the dubious ethical, sustainable, and environmental position of cryptocurrency mining and trading.</p>