Sign Protocol keeps pulling me back to one simple thought: most digital systems still do a bad job of answering a basic question — who can be trusted, and on what basis?
What I find interesting is that it tries to solve that quietly, through credentials and distribution infrastructure that feel more useful than flashy. If trust can be verified without exposing everything about a person, coordination gets easier, incentives get cleaner, and compliance stops feeling so manual.
But that is also where the tension starts.
The same infrastructure that makes access more fair and efficient can also make people more sortable, more legible, and easier to filter.
Better trust systems can unlock a lot. They can also decide who gets let in at all.