To all the above, I add that the significant change that the blockchain has made in everyone's life is to be a secure block chain where there are no fraud or scam

Yep I agree that on the blockchain we are close to saying it is impossible for something to get defrauded. But that’s not the case as sometimes some people can be careless.

decentralization since no financial body is needed to fulfill the role of intermediary; which speeds up the validation time of each movement or transaction.

Yes, this feature removes the slighted possibility of a third party . Apart from that. It could help business men and women who want to hold private meetings on the blockchain