Even though naively I treat my own domain as my online identity I see what you mean since they can be taken away by actions outside of our control. What would

Even though naively I treat my own domain as my online identity I see what you mean since they can be taken away by actions outside of our control. What would work better though? Like are we talking a more hardened identification system tied to personal data that can't change? If that's the case are there negative privacy effects of that, especially with whatever system controls that data?