What’s the most commonly used and best-in-class cold storage for BTC?
Discussion
I don't know if it is the most used, but the best for me is BitBox02
Will of course depend on the amount of bitcoin and your threat model. Hardware wallet with a metal seed backup is a sweet spot for many. For example a coldcard + cryptosteel capsule.
The hardware wallet will make it really hard to take your bitcoin even if your main computer/phone is compromised. The steel backup protects you from the even larger dangers to your bitcoin: water, fire, and someone cleaning out your papers.
Unchained Capital, plus coldcard, plus sparrow as redundancy for UC.
UC is free, has a great UI for setting up multisig and you can export your vault map to sparrow.
Support and reporting is also excellent.
Any downside to using unchained?
I'm assuming to need to dox yourself?
I think so. For my superfunds that’s unavoidable so it’s not a trade off. Personal bitcoin, sparrow and coldcard.
Ok but to the question “cold storage” can just simply be: coldcard or ledger or latest trezors and that’s it. You may not need a third party controlling your funds if you are just a single person right?
I recently got a couple of https://securedrive.com.au/product/datashur-sd/ to store seed words and instructions for inheritance. Redundant devices and encrypted SD cards. You can’t store instructions on steel so seemed like a robust solution.
So instructions + 1/3 multisig keys?
I can understand that - I don't think I'd put a single sig key in there though.