In a communistic system you’ll have issues of government centralizing power and authority. In a capitalistic system, you have issues with companies creating monopolies that have clear incentives contrary to the mass population in both systems, and clear manipulation of the money system. Within both systems you have issues with control of the many by the few.

I believe Bitcoin is a completely separate entity in which both principles and concepts from capitalism and communism can be played out with the proper checks and balance. No manipulation of the supply of money and equitable distribution of prosperity due to the deflationary aspects of Bitcoin, the technology.