Let`s say you could only have 1 account verified via fingerprint or iris or even heart beat(public anyways) to a bitcoin address and accumulated bitcoin duration, would you sign up?
Or lets say the coins you own already generate bitcoin duration coins, like POS forging kind of.
I would, all those metrics are given up every time I go out in public anyways.
If you change bitcoin from PoW to PoS then the people who hold coins will be making more coins, that's how staking works, and while more coins you hold, then more coins you will make in this process... But about the metrics, that's another technology.