melvincarvalho on Nostr: Absolutely. An nsec is a private key. Not quite the same as a seed phrase which ...

Absolutely. An nsec is a private key. Not quite the same as a seed phrase which derives private keys. But you could code it to do the same thing. What your npub/nsec can do, is receive and send bitcoins, testnet coins, and colored coins on the bitcoin network, or even litecoins if that appeals to you.