Centralized blockchain can be a great boon to the society, especially in the developing parts of the world, whereas decentralized blockchain will only cause chaos and destruction.

Incorporating cryptocurrency in the traditional centralized financial system not only speeds up transactions exponentially, but also it makes the system more user-friendly, whereas in a decentralized system cryptocurrency will only breed insecurity and chaos, due to the utter absence of liability.

The purpose of a centralized financial system or any other system, is not to exploit people, but to ensure stability in the society.

Blockchain itself is not dangerous, but if we start using decentralized blockchain as a complete substitute for our traditional transaction methods, then I am afraid, it would destroy the very human foundation of our financial system.