Here's a great overview of crypto technology by Matt Levine:
https://www.bloomberg.com/features/2022-the-crypto-story/
If you're not familiar with Matt, he writes for Bloomberg and has a knack for explaining highly technical finance things in a simple, and often very amusing way. He's truly gifted.
This article is looooong, but worth the read if you want an excellent explanation of the pros/cons of crypto and how it all works (or doesn't).