In my opinion crypto maximalism (which implies libertarianism, freedom from state's control of our money) is not compatible with being a communist or even a socialist, as the implementation of these systems requires always some kind of force being applied by the state to "redistribute" wealth, but maybe someone can prove me wrong.
While you may be right about the incompatibility of communism with bitcoin, such ideological contradictions have never prevented high-ranking communists from living in luxury or accumulating wealth. I suspect there are people all throughout the political spectrum interested in cryptocurrencies, and that those holding seemingly conflicting ideas will somehow rationalize owning bitcoin.
Given that bitcoin is not an end but rather a means to an end, perhaps it is compatible with very different ideologies. In theory, a communist country could hold it as a reserve to boost its currency or to distribute evenly, perhaps.