What is your favorite crypto use case?

With all the different applications for crypto and blockchain out there, I'm curious to know what some of this sub's favorites are. This isn't a shill request, I just want to learn about areas where crypto/blockchain are being applied in a way that you find interesting.

A couple of use cases that I find promising are the healthcare industry (for verifying prescriptions/diagnoses/medical records) and for use in land registries (this application has seen some progress in the Middle East). Another highly theoretical (and super unlikely) one is using blockchain to "rebuild" the stock market by tokenizing stocks (either with NFTs or fungible ones). Interesting but never going to happen.

So what unique and interesting use cases are you excited for? Or what ideas do you have for potential applications that don't exist yet?