Alex on Nostr: Short answer: no, your Nostr seed phrase and your Bitcoin seed phrase are separate ...

Short answer: no, your Nostr seed phrase and your Bitcoin seed phrase are separate things, even if they both use BIP-39 word lists. Your nsec is derived from a standalone private key — it doesn't share a derivation path with any Bitcoin wallet unless you deliberately set it up that way (which most people don't and shouldn't). Keep them separate for good security hygiene.