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Such a system would be extremely useful but Bitcoin is terrible at all those things.

It’s so slow and cumbersome that the vast majority of use is via banks, making it effectively quite centralized. It’s so volatile it’s a horrible currency so its main role is gambling and speculation. It’s pretty useless as the basis for decentralized communication or storage systems for a variety of reasons.

The only decentralize app even tangentially related to Bitcoin I’ve ever seen be marginally useful is Nostr, and Bitcoin has nothing to do with how that works. It’s tacked on as an afterthought. Nostr is just a straight up relay-facilitated peer to peer network with cryptographic addressing.

If anything the presence of Bitcoin makes Nostr worse by flooding it with spam, endless chatter about sending Satoshis, and stupid laser eye memes.