Meh. Nobody’s going to use it. Microsoft abandoned did:ion, another BTC like method. The did community has moved on from trying to use BTC or any type of ledger for did docs.
Looks like Saylor is shitcoining on Bitcoin.
“The Bitcoin Inscription DID method (did:btc) uses the bitcoin blockchain exclusively to store and retrieve DID information. UTXOs on chain are used to control DIDs. Inscribing data in the witness of transactions allows for greater extensibility and verbosity when creating DID documents, while reducing fees and block space consumed.”
https://microstrategy.github.io/did-btc-spec/ nostr:note1kmnvl7yt94pk4cwuk8sanqaev4qzwkhv23trzw6z22ca9z6zddgsjufyy7
Discussion
Yeah I agree, I don’t see this going anywhere in terms of use as enterprise identity is already a nightmare and this does nothing to make it easier, but we are gonna see Saylor’s rhetoric shift with this and the inscriptooors are already jumping on it saying he’s validated their horseshit
The doc does reference did:ion 
Saylor is exploring the utility value of BTC. No harm in that. The DID community tried this years ago with ledgers. For identity, a ledger is just another database. The real problem is binding a random identifier to a real-world reputation, not having a self-signed immutable public key.