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Coldcard

Coldcard is a brand of air-gapped Bitcoin hardware wallets, including the Mk4 and Mk5/Q models, used for offline private key storage and signing.

Known aliases

  • Coinkite
  • Coldcard
  • Coldcard hardware wallet
  • Coldcard Mk4
  • Coldcard Mk5
  • Coldcard Q
  • Coldcard wallet

Current stories

investOne report1 publisher

Nunchuk's developers say multivendor multisig should be the standard after Ledger's reseller compromise

Bitcoin users moving to multivendor multisig after Coldcard and Ledger face a $285 device bill at the lowest listed prices, against $59 for one wallet. Wallet makers and services like Casa and Unchained could gain customers, news.bitcoin.com reported, but the cost may push some users to custodians.

Publishers:news.bitcoin.com

Reality

Evidence45
Adoption
Not scored
Hype gap+25
Incentives70
Confidence50
investConfirmed5 publishers

COLDCARD's X account posted a phishing link despite offline two-factor protection since 2017

COLDCARD says its official X account posted a phishing link on October 11, despite offline two-factor protection the wallet maker has used since 2017. With no explanation yet from COLDCARD or X, a security alert seen on social media is worth acting on only once the maker's own website repeats it.

Perspective Coverage

5 publishers
Builder
Builder 15%
Operator
Operator 48%
Investor
Investor 37%

Reality

Evidence45
Adoption
Not scored
Hype gap+10
Incentives55
Confidence60
investOne report1 publisher

Bitget's wallet breach accounts for about four-fifths of September's crypto theft after returns

Bitget lost about $387.5 million to forged withdrawals from its wallet system, more than half of September's $742 million in crypto thefts. Most of Liquid Network's loss was handed back, so what stayed stolen sits mainly with one exchange's withdrawal infrastructure.

Reality

Evidence58
Adoption
Not scored
Hype gap+8
Incentives
Not scored
Confidence55
investOne report1 publisher

Peter Todd takes over the MARA channel that carried more than 9,000 BTC past the public mempool

Peter Todd, co-author of Bitcoin's replace-by-fee standard, now leads MARA's Slipstream, a private channel that moved over 9,000 BTC from vulnerable wallets. With two documented uses on record, both where public relay was risky or failed, the evidence that private routing is becoming a routine miner fee business is still thin.

Reality

Evidence40
Adoption25
Hype gap+30
Incentives55
Confidence40
productOne report1 publisher

Coldcard owners who held their own keys lost over $100 million to a firmware bug

Coinkite's Coldcard firmware skipped its hardware random number generator, letting attackers brute-force seeds and drain over $100 million in bitcoin. Liquid's later $320 million drain adds node software to the code a bitcoin holder has to trust.

Publishers:gizmodo.com

Reality

Evidence38
Adoption
Not scored
Hype gap+30
Incentives
Not scored
Confidence42
investOne report1 publisher

White hats move 52.37 BTC into a Wyoming statutory trust built for COLDCARD victims

The Crypto Recovery Trust, a Wyoming entity advised by Steptoe LLP, now controls coins worth about $3.5m at the exploit's implied price, against more than $100m that COLDCARD holders lost from July 30, 2026.

Reality

Evidence28
Adoption22
Hype gap+34
Incentives62
Confidence34
investConfirmed3 publishers

Ten days of maintainer time bought Core Lightning a two-week embargo on AI-found bugs

Core Lightning says the machine-written reports found real flaws in its payments software. It is holding the count and severity for at least two weeks, leaving node operators to decide what to do with a hazard whose size is still private.

Perspective Coverage

3 publishers
Builder
Builder 28%
Operator
Operator 52%
Investor
Investor 20%

Reality

Evidence60
Adoption40
Hype gap+25
Incentives68
Confidence62
investConfirmed3 publishers

Harmony offers validators nine times its DeFi TVL to switch off its own chain

Harmony blames state actors and AI agents for shutting the layer-1 it launched in 2019, and the money set aside to pay validators to power down is worth more than everything left locked on the chain it closes.

Perspective Coverage

3 publishers
Builder
Builder 30%
Operator
Operator 38%
Investor
Investor 32%

Reality

Evidence55
Adoption20
Hype gap+45
Incentives75
Confidence60
investOne report1 publisher

Trezor's spoofed alert reused the language of the $112.7m Coldcard exploit

The email telling Trezor owners their recovery phrases might lack entropy came from a real trezor.io address and passed DKIM, SPF and DMARC, and it described a defect close to the one that took 1,778.84 BTC from Coldcard users.

Reality

Evidence42
Adoption55
Hype gap+22
Incentives58
Confidence45
investOne report1 publisher

Ledger's lab took about 125 days to walk a laser flaw in Trezor's chip into public view

Both wallet makers say AI is shortening the distance between finding a bug and using one, which makes the pace of their own coordinated disclosure the number worth pricing, and the only loss they cite belongs to a rival vendor.

Reality

Evidence34
Adoption22
Hype gap+33
Incentives82
Confidence33
productOne report1 publisher

Apple's report cap blocked a seven-person firm with a patched Mac bug to its name

Apple says AI-generated submissions are flooding its review pipeline, so it capped open vulnerability reports and added a 30-day cool-down. The one blocked researcher named so far had filed 13 reports across two years.

Publishers:9to5mac.com

Reality

Evidence40
Adoption45
Hype gap+38
Incentives62
Confidence45
investOne report1 publisher

ETF buying outruns the oldest bitcoin wallets by roughly ninety to one

Decade-dormant coins are moving at an unusual clip while Warsh talks the Fed hawkish, so the tempting read is old supply against ETF demand. Divide the two flows and one side is ninety-six times the other.

Publishers:decrypt.co

Reality

Evidence38
Adoption55
Hype gap+26
Incentives52
Confidence44
investOne report1 publisher

The $20,000 red team: US guardrails push Bitcoin's defenders onto Chinese models

A volunteer group says it has swept almost all of Bitcoin's open-source ecosystem for AI-assisted exploits, and that American models' refusals made Chinese ones the default tool.

Publishers:decrypt.co

Reality

Evidence28
Adoption32
Hype gap+34
Incentives66
Confidence44
investOne report1 publisher

Coinkite now makes Coldcard owners roll dice, after $130M walked out of air-gapped wallets

A 2021 seed flaw cut entropy from 128 bits to about 40, so no attacker needed to touch the hardware. Every seed generated before July 2026 now has to be replaced.

Publishers:decrypt.co

Reality

Evidence62
Adoption54
Hype gap+14
Incentives66
Confidence58