Its like asking if the term internet is overused. In fact, terms like Decentralization and Blockchain technology have been hijacked by the popular media and is being used in a context that appears related at first glance but is actually technically incorrect. This has created an air of mystery around the blockchain technology that is making it difficult for people to trust it. 

For example you will never see the media mentioning that the Blockchain in context of being a distributed ledger or its nature as a database. Granted that this does makes it difficult to understand, but at the end of the day we need to demystify this for the people. It needs to be shown that Blockchain is not overhyped but the term is being overused in the wrong context