Here's a usecase: Blockchain can be used to issue something like Apple stocks in a decentralized manner which achieves million times more scale and lower cost

Here's a usecase: Blockchain can be used to issue something like Apple stocks in a decentralized manner which achieves million times more scale and lower cost than what's possible now. Obviously a centralized entity like New York Stock Exchange could also copy the technology of using Merkle hashes and possibly achieve much bigger scale, at the end of the day it would still be the coordination issue for a single organization. At the end of the day blockchain solves the coordination problem in a low trust environment in a definitive manner. As it turns out that the cost required to solve this coordination problem is really high when you compare it to the high trust, but low scale environment. but blockchain manages to achieve planetary scale throughput (obviously not right now because this is the foundation layer, things need to be built up). It's like cash versus Visa. Cash is possibly billion times more scalable than Visa because Visa needs to reconcile a single database but cash transactions do not, as long as the recipients locally verify that they're receiving a real bill.