It's a good technology if you agree with the goals of libertarians today which is that we should be able to do everything without trust. Having trust is such a huge shortcut of energy and enables you not to have to completely do everything yourself. It pretty much enabled civilization to begin with, but many people now have given up on trusting anything and don't think they have the agency to improve any sort of trusted authority.

There’s a lot more I could know about the practicality of blockchain but the value of the technology is still more real than the currencies that live on it. It seems to me, in my perhaps naive opinion, that in the long run blockchain might just be a way to make digital certificates of authenticity for digital goods that need a guaranteed uniqueness feature.