Blockchain is a very poor and extremely expensive database. All it's good for is timestamping documents, and it's still expensive at that compared to systems wi

Blockchain is a very poor and extremely expensive database. All it's good for is timestamping documents, and it's still expensive at that compared to systems with a central authority. The difference between the two uses is that we do have decentralized and/or distributed data stores that are quite efficient, so it's very dumb to force timestamping service to work as a data store.