Blockchain. It is a solution looking for a problem. There is a company in every category claiming blockchain solves some major problem or literally just makes something better thats working perfectly fine. I think its a great technology and there are useful applications, but they aren't world changing.
I want to disclaim right now that there are some very valid and legit companies using Blockchain, so don't take my statements as a blanket.
But I truly believe that over 95% of "blockchain"-related initiatives are scams. At best, money is moving from one pocket to another, probably with some fraud thrown in, and that's about it.