For your question about HN comments and Econ: If you are discussing molecular biology, it's easy to tell that you don't know anything. Not that no one makes mi

For your question about HN comments and Econ: If you are discussing molecular biology, it's easy to tell that you don't know anything. Not that no one makes mistakes about the subject, but at least there is a sizeable group of people prepared to say "I know nothing about that" Economics is something that everyone participates in. This increases the ease of having an opinion about it, and decreases the number of people willing to say "I know nothing about that" As for Bitcoin, that may be partly due to the halo effect. Bitcoin has an effective technical base. That can lead us to assume that all aspects of Bitcoin are effective. (Note that this is not an argument against Bitcoin. Instead it's an explanation for why people might overestimate it.)