Those appear to be the largest crypto channels, not necessarily the best.

For example, it seems the oldest channel on the list began in 2014. My channel (on currency and money) began in 2008, and I started to cover Bitcoin at 1 cent in 2011. I've made dozens of correct calls - a flawless record of predicting the price for 9 years. Reason I'm not famous: I don't invest, I only see the future. People only want to follow people who are rich. They don't care if those people have a good track record or not, all they care about is money. Money equals audience.