Couldn't this pose a threat about people participating in the musig since everything happen on Nostr and it can be by anyone even if it's encrypted (not the content but whom)
Discussion
If I understand the question correctly, I think the best mitigation is to use a fresh keypair for any wallet related activity on nostr, that way if correlations are made, there isn't much to tie the public identity to.
inb4 someone invents the next venmo and thinks tying social media identities to financial data is a good idea 🙃
I think it's the best way to mitigate this !