Just thought of something interesting.

Probably other Bitcoiners have thought of this too

So Coldcard have BIP85 Feature implemented.

So say I have 3 coldcard. and with BIP85 essentially I can have 30,000 different address stored @10000 on each coldcard

so I can have 10,000 different 2/3 multi-sig wallet by using just 3 coldcard

and the beauty in my opinion is that even if someone gained access to 3 of my main coldcard seedphrases. If they don't know the combination of the multi sig addess it won't do them well, so in a way, the main seedphrase and wallet actually become my duress wallet

e.g

coldcard 1 - Using BIP85 - Index 21

coldcard 2 - using BIP85 - Index 69

coldcard 3 - using BIP85 - Index 420

these 3 index create 1 multi sig wallet.

and I can now in a way store all my seedphrases for my coldcard in a less secure way but still have secure multi sig wallet, since the potential thief won't know what are my index combination from all the coldcard, they won't even know that I use BIP 85.

I just need to remember 3 number combination on my head.

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Discussion

is there a faulty in my logic btw? lets discuss.

Hmm now that I think about it again the main seedphrase still need to be stored securely.

Because the thief can brute force it. 10000^3 combinations

But hey, it may allow me to have dual layer duress wallet on coldcard in a way. And it prolong the thief effort a little bit.

also relying on one type of storage/signer is not recommended bc single point of failure

different ones from different sources, they say

Yeah. Time to work harder on fiat mine to get other hardware wallet.

Not sure what would be the second best wallet.

Probably will use old phone + blue wallet trick that I've seen on BTCSession YT channel.

Or Keystone seems good too.

You just made me feel really stupid for how I store sats. I see what you did there with the wallet numbers though #chefskiss

We all learn everyday from each other 🫂