How to learn more about cryptocurrencies?

There is an old (2016, pre-Ethereum large adoption) book from Princeton, Bitcoin and Cryptocurrency Technologies: A Comprehensive Introduction [1].

I find it good for the fundamentals. There is a corresponding Coursera class but I found that class a bit long-winded.

[1] https://www.amazon.com/gp/product/0691171696/

Type “reddit” or “hn” after all your searches. Reddit and Hacker News generally give accurate information, though biased, so look at both pro and anti crypto sources.

r/CryptoCurrency is also good resource.

https://github.com/ethereumbook/ethereumbook

2 books I have been recommended are: 1) Mastering Bitcoin - Andreas Antonopoulos 2) Programming Bitcoin - Jimmy Song