My MK4 has been nothing but trouble. The Q has been okay-ish, but the screen is so dim even at the brightest that I can't get cameras to scan QR codes on the screen. Meanwhile, SeedSigner works just fine. ColdCards are way overrated after actually using them. I'm probably done with them.
SeedSigner in general has a more positive team in my experience and I like their ethos better. Not for everyone, but it really taught me a lot
I would recommend using hammer in pins instead of soldering if you plan to build one yourself though. The project leader sells assembled kits. @SeedSigner
Absolutely love My Seedsigner.
The sense of achievement for a 54 year old artist to build one from purchased parts; download, verify and install firmware; create offline multisig seeds with various entropy; create child seeds for older family and then signing PSBTs with the device. Is just priceless.
The amount of new things I learnt in order to make my cold storage self sovereign made it all incredibly worthwhile.
Self custody can be done in stages. I'd suggest researching hot wallets* like Aqua and Blue Wallet, possibly Green. Aqua is great for newbs. Blue has all the bells and whistles and will be able to interact with your future signing device / hardware wallet.
Learn what your seed / private keys are and how best to store them. Become comfortable moving your Bitcoin into one of the hot wallets.
Then follow the advice here and research collaborative custody with an institution or fully self custody with single or multisig. Either way you'll need a hardware device.
The good ones:
- @SeedSigner
- Coldcard
- Jade
* Hot wallets private keys are generated on the Internet. Cold wallet generates keys away from the Internet and always completely airgapped.
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