Well yes, that's obvious...any interaction with someone else require you to 'trust' that they'll do what they say. I think you misunderstanding the context of trust-less in regards to bitcoin though.
Maybe, but I think you're missing my point. When you buy Bitcoin (or whatever) you're betting that someone will want to trade you something else for it in the future. That "someone else" isn't a concrete entity, and "they" haven't given you any assurances of any kind.
I was replying to an argument that cryptocurrencies are superior to state-issued fiat because they don't require trust. IMO this is nonsense. Using anything with zero intrinsic value as a store of value is a gigantic leap of faith.
