Congratulations, now your trust relies on your subject never becoming important enough that someone bothers to run 50%+1 of the nodes in your network which means only very, very large subjects (or ones where trust wasn't very important in the first place) ever even have a chance of that not happening. What do you say? Your technology doesn't scale to very, very large subjects because of abysmal transaction rates?

solution in search of a problem

Idk I think centralised trust is a problem in and of itself but you can just look to history and world events that created bank runs and financial crashes like y'know - 2008, a year later the bitcoin ledger began.

it's far easier to establish a source of trust.

Yes but it also comes with problems as mentioned above. Blockchain tech being used for scams if anything is evidence of it being a mature and functional technology for finance because under capitalism it's all inherently a scam of some sort.

That said we shouldn't let perfect be the enemy of good, I'm glad the technology exists even if I don't think it achieved what it set out to do quite as well as one would've hoped, if for no other reason than the fact we can all just buy any drugs online now with one day delivery instead of being stabbed on the street after calling some number like barbarians in the olden days.

Having too much electricity and not enough CO2.

Apparently, it can be very secure. If “pieces” of a secure key are stored in multiple places, for example, only changing one link in the “chain” means it won’t match with the others. They ALL have to be changed at the same time, which is virtually impossible to do in secret.

Please note that I am far from an expert on the subject. I’m paraphrasing an article I read months ago.

Essentially, verifiability (the token exists on the blockchain), de-duplication (each token can only exist once on the blockchain), and proof of ownership (only one account number can be associated with each token on the blockchain). There's nothing wrong with this idea in a technical sense and it could be useful for some things.

But... the transaction process is computationally expensive. For the transaction to be trustworthy, many nodes on the blockchain network must process the same transaction, which creates a whole bunch of issues around network scaling and majority control and real-world resource usage (electricity, computer hardware, network infrastructure, cooling, etc).

And beyond that, the nature of society and economics created a community around this unregulated financial market that was filled with... well, exactly the kind of people you'd expect would be most interested in an unregulated financial market - scammers, speculative investors, thieves, illegal bankers, exploitatitive gambling operators, money launderers, and criminals looking to get paid without the government noticing.

The technology can solve some interesting problems around verifying that a particular digital file is unique/original (which can be useful, because it's extremely easy to make copies of digital information) but it creates a long list of other problems as a side effect.

Intermediary free monetary transfer, lack of trust, transparency

I've heard of using them as parts of like contracts?