About extreme scenarios like 80% of btc stolen (- I'm going to ignore the "how do you measure it" part, though I suspect that'll come back to bite us at some point!): i mean there is presumably a failure mode where trust breaks down, but it's not really about a specific number or ratio. It's about whether there's any credibility that going forward, the system will be trustworthy. Anything above 30-40% is presumably disaster-level and the project *might* just kind of fall apart. But I really don't know. I just know that if you violate the core principle of private property you've mostly already lost. Maybe I'm wrong and everyone would love it, but what's the point in bitcoin in that case, I don't see it.
