Mastering bitcoin is a must read to understand the technical part fully. Even if the book is read only partially, as it goes into programming. You say (before he lost his way) what do you mean? I was wondering why there are no new videos available.

Indeed, one would think that with his knowledge he wouldn't go for shitcoins. In his defence, he wrote it in 2018. From the programming point of view, ETH might be interesting.