HN like Bitcoin because it is cool. HN hates government intervention in general. The outcome is pretty predictable.
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.