He is, truly. But...there is one but about Andreas in my eyes. He focuses primarily on Bitcoin and not reflecting altcoins. I mean, he is, he is talking about zero knowledge and other stuff you can find in altcoins, but not mentioning some others. I understand, that he has limited time to write a book and read/study all the new "shitcoins" all the time, so that I like the work of other people too. But yes, he is great crypto person and enthusiast!