Sleep at Night Technology! Ultra-secure Open Hardware Wallet for #Bitcoin. The only dedicated air-gapped. Backup on SEEDPLATE. f/ @Coinkite, makers of @OPENDIME

COLDCARD®
Joined December 2017
Successfully created an air-gapped 2/3 multisig test wallet with a single @COLDCARDwallet and was able to receive and send funds. That learning experience cost me 122 sats in miner fees. #Bitcoin
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Coldcard [mk3] remains the best hardware wallet out there, from a company that puts #Bitcoin first and does not risk/waste resources with scammy shitcoinery "projects" Guessing this new model will go a step beyond. Highly recommended in value for money. 👌
COLDCARD Mk4 Early Bird $40 OFF reservation begins today store.coinkite.com/store/mk4
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콜드카드 비트코인 전용 하드지갑 Mk4 선주문 $40 할인! 트레져원 쓰다가 이 기회에 하나 주문했습니다.😃
COLDCARD Mk4 Early Bird $40 OFF reservation begins today store.coinkite.com/store/mk4
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COLDCARD retweeted
In case you missed, we released information about our contactless [NFC] #Bitcoin smart-card initiative. They are close to ready for beta & devs. The two long threads got a chewed by twitter, better links: -@SATSCARD; t.zotan.services/nvk/thread/14838… -@TAPSIGNER; t.zotan.services/nvk/thread/14841…
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Mk4 Cold Card on the way! Gotta catch 'em all. Upgraded secure element USB C port NFC More RAM (multisig) And still with clicky buttons...
COLDCARD Mk4 Early Bird $40 OFF reservation begins today store.coinkite.com/store/mk4
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> I don't need the cold card mk4 > zeus adds NFC support > maybe I should get a cold card mk4
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COLDCARD retweeted
Replying to @nvk
Yes it’s a great product but more than that your products have in a fun and curious way forced many of us to learn and try and understand a bit more how bitcoin works. Thank you 🤙
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COLDCARD retweeted
COLDCARD Mk4 Early Bird $40 OFF reservation begins today store.coinkite.com/store/mk4
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Worried about losing your #bitcoin? Invest in a signing device: - Buy a @COLDCARDwallet - Transfer long term holdings there Easy way to not stress in the market.
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COLDCARD Mk4 Early Bird $40 OFF reservation begins today store.coinkite.com/store/mk4
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And btw, Mk3 is so good that we haven’t stopped making it 🤷‍♂️
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COLDCARD retweeted
I'm in for 5
COLDCARD Mk4 Early Bird $40 OFF reservation begins today store.coinkite.com/store/mk4
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COLDCARD retweeted
If you want #Bitcoin to go up, zero your balance in exchanges. That will limit their ability to lend to shorters. Cold storage, even institutional, should be done in a hardware wallet. Custodians may be lending your Bitcoin without your consent. @saylor try this out 🙂
COLDCARD Mk4 Early Bird $40 OFF reservation begins today store.coinkite.com/store/mk4
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COLDCARD retweeted
I finally got around to transferring #Bitcoin from one passphrase managed wallet to another passphrase managed wallet and it was a challenge at first. It took me a while to figure out the process using my Coldcard. The @SparrowWallet/@COLDCARDwallet integration is the best.
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COLDCARD retweeted
After some debates in my timeline recently I decided to pull out the few #BTC I still have in exchanges and centralised lending platforms. Let's drain the supply and move it to @COLDCARDwallet! #Bitcoin
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COLDCARD retweeted
GM. But wait. There is more. Another long 🧵 What is @TAPSIGNER? It's a #Bitcoin private key on a card! You can sign mobile wallet txn by tapping the phone. Your mobile wallet provides most of the wallet logic and TAPSIGNER holds the secrets.
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COLDCARD retweeted
7/ Since we-are-still-so-early™ we want to fully explore this technology for #Bitcoin in multiple types of hardware and purposes. We love NFC so much we are adding to @COLDCARDwallet too (w/ hardware kill method)
NFC ❤️ PSBT #Bitcoin @COLDCARDwallet @bluewalletio Very early days, still lots to improve. NFC is cheap, the world can have “easy UX” with phones at fair prices Bitcoin NFC coming very soon 💪 Almost every aspect of bitcoin can be done via NFC, raw TXN, xpub, xpriv, PSBT,etc
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COLDCARD retweeted
What is @SATSCARD? It's an @OPENDIME in an NFC card form factor with 10 times the reuse capacity. Gift and trade #Bitcoin physically; maximize in person trade while minimizing trust between parties. [OD will remain for sale, for ever... Just more "optionality" for bitcoiners]
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