The general sentiment on HN against cryptocurrency and blockchain has always been pretty negative as far as I can can remember.
A quick algolia search seems to support that too. Most of the highest voted stories about cryptocurrency and blockchain are negative news and opinions. There are a few highly voted stories about cryptocurrencies and blockchain too, but far fewer.
If you search for something specific like Bitcoin, there looks at a glance to be more positive or neutral stories with high number of votes, and still a few negative ones about that too.
You’ll often find a few positive comments on the stories though, so it’s not like everyone hates it. Not saying that. But overwhelmingly I feel that HN readers as a whole range from disinterested to actively against anything blockchain and that this has been the case for a long time.