In the context of ICS, is it possible for Cosmos Hub validator to collectively secure, say X% of the consumer chain, while the consumer chain’s validator will secure the remaining, in this case 100 - X%.
Good question. This has been known in the past as “Layered Security”.
At Informal, we stopped working on it a while ago, in favor of helping collaborate on Mesh Security, which is a pretty flexible design which can do basically the same thing.