As phone identities become merged into npubs similar to services like:
https://mysudo.com/

My identity, through services like  nostr:npub1tm99pgz2lth724jeld6gzz6zv48zy6xp4n9xu5uqrwvx9km54qaqkkxn72 are now:
Email: mike@mikehardcastle.com
NIP-05: mike@mikehardcastle.com
Lightning payment address: mike@mikehardcastle.com
Phone identity: mike@mikehardcastle.com

Future:
Passport
Driving License

Bitcoin separates the state from money

NOSTR separates the state from identity

This is self sovereignty!