Now, I am a blockchain skeptic, but this is only half the story. Some unique traits of blockchains:

1. They're immutable (this is as I understand even unique as compared to git, which also uses Merkle trees)

2. They use distributed replicas (as opposed to distributed partitions).

3. Maybe some other stuff that's slipping my mind at the moment.

The multi-billion dollar question is in which use cases those traits are actually useful. So far we're progressively ruling things out as we watch distributed blockchain products simply gravitate back towards centralization.