Also how about "where does liquidity come from for stability pools"

We're there. This is classic "other stuff" :)

So we get "Frostr" and have Federation Guardians automate notices that are verifiably co-signed by the guardians published on Nostr

"Hey we have an interest rate here at xyz% come add funds to our stability pool"

Nostr becomes a marketplace to connect liquidity to earn a fee on Bitcoin. Match this with fidelity bonds for mints etc for trust :)