#diy #cold #wallet 🔨Ⓜ️🔠🔩🧷🧡
https://blockmit.com/english/guides/diy/make-cold-wallet-washers/
Shamir 3/5 min is recommended
https://blog.trezor.io/shamir-backup-the-revolution-of-private-keys-backup-is-here-858687ed7fe7
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