To allocate my time into more safe spaces. Would you like to keep your bitcoin in a wallet where you're not sure who know your seed phrase? It’s kinda same implications

A Bitcoin seedphrase is a singleuse thing anyway. One should just not reuse them in general. But a Nostr nsec represents a pseudonym of you. So I think, when there is no proof that someone has my nsec. Why should I act as if it was compromised? I can only speak for me. But my nsec I would not consider very sensitive yet. None of my family knows my npub and would trust it therefore.