IMPORTANT: #MultiSignature
Typical #btc spends are done from a #single signature wallet – one device is able to spend. Multi-signature makes it so that you can require multiple devices to spend coins. The typical set-ups are 2 of 3 devices or 3 more.
Probably one of the most important #nostreets 👆(above) I have done. Protect yourself from physical attackers that want to steal from you by geographically distributing this Signatures.