Also, Bitcoin draws libertarians... and HN is full of modern liberals. So, it doesn't sit well with them.
Having said that, it is understandable that most people won't invest in something completely new or risky. One would not be able to build wealth like that. They'd be taking too many risks and that could most likely work against them.
So, a good balance needs to be maintained. If you most of your money in safe assets and try out small risky things once in a while, you are relatively safe while opening up to being lucky.