> Broadly speaking blockchain only solves a singular problem: Trust
This is only true in the cryptographic sense when talking about data on the blockchain.
Blockchains do NOT solve any trust problem outside of data on the blockchain, and in real world use cases when we're not dealing with how many coins each person has in a wallet, this is the most important thing.
Specifically your cryptographic tamperproof data on the blockchain is useless if you have bad actors entering garbage data.
It's useless if the data on the blockchain is out of sync with state in the real world.
Even in the internet commerce use case where bitcoin was supposed to take over, once the bitcoins are transferred you still have the unsolved trust issue of verifying delivery.
Saying blockchains solve the trust issue in the real world is disingenuous magical thinking, and I wish people would stop doing it.
This is only true in the cryptographic sense when talking about data on the blockchain.
Blockchains do NOT solve any trust problem outside of data on the blockchain, and in real world use cases when we're not dealing with how many coins each person has in a wallet, this is the most important thing.
Specifically your cryptographic tamperproof data on the blockchain is useless if you have bad actors entering garbage data.
It's useless if the data on the blockchain is out of sync with state in the real world.
Even in the internet commerce use case where bitcoin was supposed to take over, once the bitcoins are transferred you still have the unsolved trust issue of verifying delivery.
Saying blockchains solve the trust issue in the real world is disingenuous magical thinking, and I wish people would stop doing it.