If someone still didn't get it - the whole original post was a hilariously executed troll. The author very clearly states this:
"See, a bitcoin rant is almost too over-the-top for me. Asking why I think bitcoin won't work is like asking why the sky isn't red. I mean, wait, you think it is red? You actually took that seriously? Oh boy. Where do I even start?"
"For the record, I'm stupid and trolling. That's why it was hard to tell."
I don't think that's true at all. The original post was a cogent, if brief, explanation that about currency and the challenges for bitcoin. The last quote is most certainly meant to be sarcastic. He most certainly is trying to tweak people who are all worked up into a lather about bitcoin as a serious replacement for currencies. Just because he's provocative, doesn't make him a troll.
It appears a lot of HN readers like you took his comment too literally and killed the post. It's a shame because he makes some good points worthy of discussion. I'm not certain I agree with all of them, but there's certainly plenty of substance there. In contrast, this "rebuttal" adds little.
"See, a bitcoin rant is almost too over-the-top for me. Asking why I think bitcoin won't work is like asking why the sky isn't red. I mean, wait, you think it is red? You actually took that seriously? Oh boy. Where do I even start?"
"For the record, I'm stupid and trolling. That's why it was hard to tell."