Cryptocurrency promotion implies to some extent that central control of money is a bad thing. So it is somewhat political.

I think most HN folks are against it for political reasons to a certain extent. Even if they say they aren't, they are getting their information from and socializing in a bubble with a political bias.

There are some news topics on HN that i will never read the comments of because of how motivated and biased the reasoning is behind them. Bitcoin comments I will still read though, since it's fun to see everyone's tone and reasoning evolve as Bitcoin slowly gets more traction and rises in price over time.