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Not the person you're responding to, but my view on this is: Having one online identity that is publicly viewable by everbody is a privacy nightmare. Yes, I know that it's pseudonymous, but it's possible for a sufficiently motivated entity to find out who is behind a pseudonym.

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Zero-knowledge cryptography allows you to post opaque data to the blockchain and selectively reveal properties of it to chosen people and applications.

For example, a zero-knowledge DID can generate a proof to an age-restricted application that you are over 18, without necessarily revealing your birthdate or any other information about yourself.

And this is already covered by the DID/VC W3C specs that don’t need a blockchain. An age restriction in particular will _always require the blessing of a central party_.

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