Decentralized economy is nothing like communism, not even a single percent. Communism is a flawed concept. It promotes inefficiency as well as ineffectiveness. The sense of propriety lacks in communist society hence such economy can never grow, USSR is perfect example for this.
But decentralization is something much better than other forms of market. No one in today's date wanna controlled by other forces. As a bitcoin advocate, I can say that whether it's currency or any other commodity, if it is free from state's control, it is more accessible to public at large. However, decentralized economy do promotes inequality. It widens the gap between rich and poor. But as a common saying states: "Survival for the fittest". You need to grow on your own rather than waiting for support from government in the decentralized economy.