I don't think that Blockchain is only a decentralized system, as it was discussed that blockchain can be both a decentralized and centralized system depending on the way it was implemented.
A blockchain can be either centralized or decentralized. It is important, however, that decentralized not be confused with distributed. While a blockchain is inherently distributed (meaning that many parties hold copies of the ledger), it is not inherently decentralized.
The question here is if we really need a centralized blockchain in which everything is controlled by small group of people. They have absolutely different views on how system should work, there is no space for immutability, security, accessibility in a blockchain of such kind. Just some thoughts from this article:
Well, we are talking about blockchain here and I am just pointing out that blockchain is not only decentralized but rather, can be centralized. As of the question, if we need a centralized blockchain, I think the same thought will be given to the decentralized blockchain system. Each has its pros and cons. We cannot say that decentralized blockchain has no cons, the same goes for the centralized system.
The problem with us is that we became fanatic of something that anything against what we believe becomes wrong. We fall into the category of being biased and that is not healthy.
Blockchain technology is very promising,but the full potential of this amazing technology is yet to be discovered.
BC is still at a very young stage, and during this time, it is still on experimentation and exploration of where it will fit in.