Cryptography based Banking
There are lots of good reasons to not base money transfers on arbitrary numbers that you need to keep track of. Right now, banks have to make sure themselves that a transaction is legitimate and may never lose record of it, otherwise money just disappears to someone’s damage. With a blockchain, you get a hard proof a transaction took place. Whether that’s to proof you paid for something or for law enforcement to know you bribed a certain someone, I firmly believe it’s better than what we do now. If my bank told me tomorrow I have no money or claimed I spend it all on terrorism, I would be in a pretty bad spot.

Ownership and Track Records
We live in a time of misinformation and AI generated bs. With the help of a blockchain, you can keep track of who posted something first, i.e who has the copyright or started some false information campaign, and also who generally spreads bs. This of course also works the other way around: Who has a good track record and posts trustworthy news or original content? And again, you wouldn’t necessarily have to rely on a single institution to play nice, not delete content etc. Although admittedly, it’s much more complicated this case, because you have to expect bad actors much more than in banking. Banking is infrastructure, this can be a lot of things (science and/or opinion and/or legal stuff…).

No

Fine, I’ll elaborate a little more.

Blockchain generates typically with huge cost and inefficiency a decentralised ledger of events. If you are going to use a blockchain you need to ask yourself tow questions. 1. Do I need a decentralised ledger/record of events and, 2. Am I willing to put up with the huge increase in costs for creating said ledger.

In my opinion there is nothing that satisfies these two requirements. Blockchains can not remain decentralised for anything that interacts with the physical world as some needs to input the data in the blockchain. This requires you to trust a party destroying any notion of decentralisation (i.e. if an entity can control what goes into a blockchain then it really isn’t decentralised).

Following from this if you are willing to accept and trust a centralised actor to control what enters your blockchain why not trust them to manage your ledger. It would be simpler and easier than using a blockchain.

Finally, as for digital goods that don’t interact with the physical world. Why do you want to introduce a decentralised scarcity? It’s a silly idea. Either you own the intellectual property and you decide who has a license to use your digital goods (in which case you don’t need a blockchain) or you leverage some of the best attributes of the digital world and you leave the good to be freely copied, downloaded and used. A blockchain is just a wasteful unnecessary exercise at that point.

Basically there’s no legitimate use case for blockchain. The best proof of this is just how little real world adoption blockchain technology has in the real world. It’s as old as the iPhone and yet I don’t know a single person who uses it to get things done in their day to day lives. If it had a use we would have found it already.

I’d say in theory it could be used something like public records of proof for ownership of immaterial or intellectual property and the transfer thereof. Say the rights to music, writing, digital art and whatnot. Like the essence of NFT without the hyped up crypto bro speculation and pump’n’dump.

The difficulty would be to get it recognized as legally valid and the bigger difficulty that as there is no central authority there is also nobody being able to rectify fraud or user mistakes. If you implement central authority it’s basically just any old list of transactions with some extra crud so then the question would be why even bother.

It’s not even good as a bank. On the other thread you mentioned I commented that blockchain is an immutable ledger visible to everyone. That is a nightmare for privacy reasons.

Audit logs is genuinely the only application I see it may be good for, but we have other systems that have a smaller environmental and technical impact making them a better fit than blockchain.

The general category of potential use case is when you want some information to be public, undeletable, and outside of corporate or government control.

While I can’t think of a compelling use case at the moment (other than whistleblowers, maybe), given the direction our corporations and government are going it seems like the sort of thing that might become increasingly useful in the near future.

This looks interesting https://github.com/ortegaalfredo/blockchainbay

Disclaimer I have not tried it , just discovered it now

Its only real use is as dark money. Which isn’t always a bad thing - there are a lot of activists in oppressive countries who rely on bitcoin donations, Anarchist Black Cross comes to mind.

But, as you said, it’s not really as “dark” as people think.

I seem to recall someone developing a “game” that was based on the blockchain but used to crowdsource protein folding models or something like that? I could be mixing two memories though. I could see how the concept could possibly be implemented for something like that, but I wonder if it couldn’t be handled more energy-efficiently by like a single quantum computer doing calculus.

It’s a good way to pay for illicit drugs, weapons, anything really, that you ordered using TOR, or your favorite unattributable communications technique. If you believe there are laws that should not be, that’s good. If you are in favor of those laws, not so much.

Fraud!