Paper seems like a weak point #56
Description
Consider updating _docs/deposit/store-data.md, because using paper for backups seems like the weak point in this protocol. Even with geographic separation, paper is prone to various environmental risks. Seeds hammered into metal (steel or titanium) can mitigate some of these risks. Admittedly, wallet descriptors are a bit unwieldy for this process, and would need an alternative treatment, but they are less sensitive with keys removed. That may be a form of digital storage, perhaps in addition to paper.