Oh, I didn't mean to sound offensive. Sorry for that.

I think if your definition of communism is that

- everyone is free to join or leave anytime they want

- everyone is free to use "it" however they want

- people that provide value (e.g. mining) get rewarded with proportional buying power and can spend it on whatever they want

- it can't be subverted/changed by a single "leader"/committee

- it doesn't split people into two classes of "good" and "bad"

Then yes, according to this definition Bitcoin would be communist. I spent couple years living under communism and I would definitely NOT use this definition.