We want to damage ourselves by sanctioning others? You said that taking others wealth makes people lose trust in you and therefore hurts yourself. So I don't see why we would do that on purpose.

I think you're confusing me with someone else. I didn't say anything about trust.

But, I suspect the other guy was referring to trusting in economic stability. I don't think there's any reason why sanctions against bad actors like Russia might undermine trust in American investments.