I think you're doing a disservice to the dissenting voices. Sure, some of it is probably jealousy due to missing out in MaSsSiVe GaInZ but I think there's a lot of room to say that something is a bad idea regardless of whether you have a stake in it.

I own some Bitcoin I mined myself in the early days. By luck or stupidity, I lost it for years and then found it in an old backup and now it is worth a number that would afford me a healthy retirement if I could get over my analysis paralysis. But I still think Bitcoin, as it embodies the idea of "crypto currency," is a terrible idea as a store of value, as an impact on our planet's environment, and as financial policy.

I feel the same way about housing policy (I own a house in Seattle), about transportation (I used to own two cars, but now none), about tax policy (I benefit greatly from Washington State having no income tax and relying mostly on flat-rate taxes that don't take up much of my income), and several more. Even though they're personally good for my family and me, they're terrible for the society at large and we have to live in a society so I'd like something better.

So, yeah, I think it's a bit reductive to distill the dissenting voices on HN down to "well, they didn't buy and hodl so they're just grouchy."