A good Bitcoin setup is not only about where the seed is hidden.
It is also about whether the setup can still be understood when you are not there to explain it.
That part is easy to ignore because today everything feels obvious. You know the wallet, the devices, the passphrase situation, the old tests, the real backups, the people you trust, and the things nobody should ever type online.
But memory is not a continuity plan.
SPC is built for the safe context around self-custody. Not the secrets. Not the keys. Not custody. Just the part that helps the right person slow down and avoid guessing under pressure.

Seed phrase = access. Companion = continuity.

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