[api]

Different reasons for different people. There are several camps of BitCoin haters:

(1) There are people who think it's a pure speculative bubble or pyramid scheme. (I disagree because it has utility.)

(2) There are also people who point out that it's a deflationary currency and therefore broken. (I sympathize a bit with this view but it's not enough to make me dismiss it completely. I think this might be a solvable problem.)

(3) There seem to be some who just take a contrarian position against things that have received a ton of hype or that are too fashionable.

[ssharp]

There is also a camp of people who don't think Bitcoin has much utility when compared to established alternatives, let alone other advances in other crypto/blockchain tech.