It's so weird to me that here, on hacker news people have such a hatred of coinbase. Coinbase is a YC company, and if some of the predictions are accurate, will be the highest valued YC company so far.
It's because they view crypto like people viewed the internet/computers back in the day. "It'll never work it's too complicated. No need for it, mail workers just fine. It's just used for illegal activity. Why do I need a productivity boost when I have my assistant to do everything. "
It usually seems far more nuanced to me. People seem somewhat skeptical on some finer points of cryptocurrencies, blockchains and distributed ledger ideas.
But then they see supporters trumpeting 'this is good for Xcoin' on every piece of news, good or bad, and can't help but get a snake-oil-salesman-y feeling from that. Everything in life has many ways in which it can or does suck, and you won't want to trust people who handwaive away or dismiss the sucky parts.
So... partially reasonable technical and idea concerns, and partially a PR problem that anything with a particularly large and vocal fanbase will have.