A variety of reasons. Some think that crypto is a socially pernicious bubble that’ll get people hurt. Others still have to deal with the ransomware attacks that are only viable with crypto. Most of us are pissed off that crypto comes along and keeps ruining the price of hardware we want to buy. The environmentally minded are angry about the energy usage. A lot of us are sick and tired of the naked scamming and the dumb ideas that get floated on the subject.
> I feel that if most HNers would just build a crypto business (DeFi, arbitrage, NFTs, tokenomics, etc.), they'd basically be overnight millionaires.
Obviously not. That’s just not how anything around money works. If it sounds too good to be true, then it probably is. Just because someone got rich off a thing doesn’t mean everyone will; after all some people got rich in pyramid schemes too, doesn’t make it a good idea.
Even when there is legitimately easy money to be made, the rush of people trying to exploit the opportunity usually drives the per person profits down to $0. If someone claims that there are easy, guaranteed millions to be made, your alarm bells should be going off.
Furthermore, even this tiny whiff of “you’re just jealous you didn’t make millions flipping NFTs” is an ugly look.