I considered saying bearish. Maybe I could have been clearer.

I have a low opinion about the usefulness of cryptocurrencies because true security is so difficult. It's basically impossible, even if you don't make any mistakes.

I really enjoy this kind of stuff, and loved reading about the z-cash ceremony. I'm not going to those lengths to protect my secrets, so I feel it's better if I don't hold a lot of wealth in such a fragile way.

I used to like it, but now I don't. It's still neat, but it's too prone to costly mistakes.

They try to make default banking activity on those devices many of us consider possibly compromised...

I'd just say "I'm against"

not everyone is a stock marketeer - I personally keep reading bullish as derived from a bully - something clearly negative

So bearish is negative? What about hawkish?

Bullish and bearish are common stock market terms[1] meaning optimistic and pessimistic. Hawkish means advocating war, which doesn't clearly align with optimistic or pessimistic.

[1] https://www.nerdwallet.com/article/investing/bullish-vs-bear...

And the same meaning as "I'm up for that".