This paper synthesises the fragmented and conflicting findings of 29 quantitative studies on cryptocurrency adoption behaviour using a meta-analysis approach to generalise the hypothesised associations. Accordingly, the most significant antecedents of cryptocurrency adoption behaviour are perceived usefulness, ease of use, social influence, perceived behavioural control, attitude, trust and personal innovativeness. The moderator analysis confirms that the countries' cultural dimensions, economic development, and innovativeness level, impact conceptual relationships. Furthermore, the COVID-19 pandemic increased the magnitude of association between perceived usefulness, perceived risk, perceived behavioural control and behavioural intention. This study is one of the initial meta-analyses on cryptocurrency literature, aimed to advance the literature by adding a comprehensive understanding of antecedents that influence behavioural intention to adopt cryptocurrencies. The results of these studies have implications for both the academicians and as well as for the practitioners interested in promoting cryptocurrency and theoretical underpinning for future researchers.