HN has a fair amount of "Bitcoin is overvalued" people as well. Note that the type of thread to reach the top of HN tends to be something groundbreaking, which will skew the discussion to the extremes.

Also, the comment you are responding to complained about all of three pro-bitcoin comments (Two top level) that were all posted less than 3 minutes before his.

This seems a little unfair to me as it's possible that this thread was likely buried (hence no replies for >1h) and just surfaced to the top of HN.

I speculate there's a lot more resentment on HN towards cryptocurrencies than you might expect.

Agree. HN has a sizeable left-leaning and pro-state/pro-fiat population.

Not sure about the readership,though. But I think you're right with regards to the discussion - you only hear one side a lot which makes it appear that there is only one side which is the majority. But it's really not the case, however: opposing views are being bashed or brigaded to the point where expressing such views has become unsafe or too much effort. So instead of real discussion, people who are not left-leaning/pro-state/pro-fiat increasingly just use only karma buttons.

I consider that the point of having karma: Spend it in discussions where I disagree with the HN hivemind. ;)