We may all have different ideologies and have different political beliefs, but the only thing that everyone agrees on and the only thing that everyone likes is money, and bitcoin gives everyone the opportunity to make some, so it does not matter whether you are a communist or a librettist, plus in our current society most of the people don't care about these kind of ideologies, for the late boomers and beyond who are the people that are shaping the future don't care about these stuff.
It's not true that everyone likes money, the ideology of communism seeks to abolish money totally, because money is in the core of market economy, and they want to replace market economy with communism, where everything is free. People like money only because it can be exchanged for goods and services, without it it's just paper or bits on a computer, so when money become worthless, no one likes them anymore. So, communists wouldn't refuse if you'd offer them some free Bitcoin's, because a money is a money, but their goal is to make Bitcoin useless, and to them Bitcoin is a representation of pure capitalism, because it is essentially a digital private property, so don't expect communists to be fans of Bitcoin.
I have limited knowledge on communism but I am sure that it is just another idea that failed to work when implemented in the field all because as humans we are dealing with the weaknesses of the human nature. Bitcoin is partly about returning the power to the hands of the people and minimize the role of the government in the financial system (though this has not fully happened yet). Right now, I don't know of any country that can claim to be under true communism as countries like China and Russia have already adopted many capitalistic ideas and concepts and are now playing and competing in the global market.
So the question is if bitcoin can be compatible with communists? Well, to me, as long as they are still using money then maybe there will be no problem unless of course if the government they are under made a strong stand against the use and trade of bitcoin probably not because they are communists but because they are afraid to lose the supposed control on their economy and the people.