We had this back in the 70s, FWIW. It failed as a miserable hunk of garbage then, it's failing as a miserable hunk of garbage now by all metrics except how efficiently it parts fools from their money.
Sorry, what?
What's old is new again. I'm old enough to have used one of these in the early 80s, learned about from a BBS I was frequenting.
That's the problem though - blockchains aren't garbage. They're useful.
The actual problem is that currency speculation is garbage. If people were using BTC for its intended purpose (transferring money to and from people they don't trust) it'd be brilliant and it'd have a much more minimal environmental impact.
Also, I think instead of "solved problem" you mean "solved for white people in rich countries"
Wow that's all? Seems so much easier than just having a crypto wallet and sending anything to anyone at any time.
Maybe the scamming is the problem - and you're not going to solve that with technology.
If they were useful, all these corporate pilot programs would be raging successes by now. Instead they quietly fizzle.
I personally haven't seen an application that isn't better implemented with pre-existing technologies.
We figured this out in the 70s. That some idiot resurrected the idea in the '00s and got a bunch of people to buy into it tells much about the state of "technology enthusiasts" on the internet.
Making BTC transactions is the very thing that costs electricity in the BTC network. If no one made any BTC transactions today, then no blocks would be added and every miner and node would be idle.