This article highlights the complexity of taxation surrounding cryptocurrency transactions due to the lack of uniform regulation, creating uncertainty for both taxpayers and tax authorities. After determining the tax obligations of individuals in taxation, a survey has been conducted to assess the level of knowledge and compliance with tax obligations related to cryptocurrencies. The survey, in which 103 people participated, reveals the confusion and errors that prevail in perceptions of the tax obligations for cryptocurrencies, particularly in transactions such as swapping and staking in personal income tax. This results in almost half of the respondents (49.5%) not declaring any of their operations with cryptocurrencies. The reasons for this include the fact that the majority of respondents (66%) find the regulation of cryptocurrencies in Spain confusing and difficult to understand. Additionally, 87.4% believe that tax agencies should provide more information and resources on the taxation of cryptocurrencies and digital assets, and that there should be clearer and more comprehensive regulation. However, it should be noted that 41.7% also consider that tax regulation discourages investment in cryptocurrencies.