What does turn it into dangerous nonsense is the "solution looking for a problem" phenomenon, fueled by techno-libertarians and more so plain greedy people, looking for a way to justify and entrench the mostly useless technology that makes them rich.

In the sense that it is useless for society, by extracting the collective's wealth while providing no net benefits.

So deep. We all live in our matrix bubble

By that logic, would you say that Bernie Madoff's enterprise was useful, as it made him rich?

If it makes someone rich at a high cost to others without adding any value whatsoever then it is useless.

In light of the massive energy consumption it may be worse than useless.

Compare romance scams, authorise push payment fraud, and ponzi schemes.

All of these make someone rich, and all are negative sums, being in fact worse than useless.

In quite a lot of cases it's because we need someone to take responsibility for the actions of an entity, or the blame when something goes wrong. In cases like that the blockchain won't really change much, and it ends up being another technology/process that is available.

That being said, I'm sure there are other cases where the blockchain can be used. The problem is that it's currently used as the proverbial hammer, making every problem look like a nail.

Oh, you're about to enter the world of wonders: https://ethereum.org/en/dapps/#explore

I found a use for it: Doxxing.