Earlier quoted context omitted.
You can only be sure in hindsight which solution is comparatively or net good. Not all hard work done by smart and nice people turns out to be worthwhile. There are always trade-offs and cryptoassets bring them too. You have good reasons to be worried about centralization, but concerns that this technology empowers crime and totalitarianism, just in a different way, are valid too.
All technical solutions are trade-offs. See, burning coal is bad for the environment under many angles. But it fed the energy to the industrial revolution, with immense improvements to everyone's quality of life (from running water to advanced medical care). Now it's time to retire it, but it won't be realistic to go from muscle power to nuclear and solar power directly. Same thing with crypto currency. It's like a s…
That's not true though. Crypto currencies do not solve any real problems in any meaningful sense. The problems it solves are all either problems that were created by crypto itself, due to the insistence on using that particular network architecture (which isn't even good), or are better solved in other ways. Moving to proof of stake fixes one of the fatal flaws in the scheme: the energy usage. All of the other fatal flaws still remain: The inability to do anything about fraud, the disastrous security of smart contracts, the ponzi-like economics, the inherent unfairness of mining/staking, the practical lack of decentralization and vulnerability to 67% attacks, the lack of any kind of legal structure around anything whatsoever, and not to mention that the technology is actively enabling new kinds of crimes like ransomware and evading sanctions on a grand scale...
It's patently obvious that the "tradeoff" for most people is that you get to gamble on the price of a highly speculative asset in exchange for enabling massive amounts of crime. I don't like that tradeoff. As a society, we can collectively decide not to make it.