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Channel Posts
| 2 | Bitcoin and It’s Future
The Cold Card incident is a pretty big deal. I can see people move to custodial services to holding their coins. Yet at that point why not buy an ETF or the stock market which is insured and you’re not going to lose your funds.
I have a large amount of money I was planning on investing into bitcoin towards the end of the bear market but I’m worried about how I’d store it.
https://redd.it/1vcd9fm
@r_bitcoin | 6 |
| 3 | (Coldcard) Lost 18.25 BTC
Any idea if there’s an organized central place to upload documentation of wallet / transaction id’s in the off-chance that the stolen BTC surfaces on a regulated exchange?
Had all my BTC on 3 devices. All MK3’s. All got drained over 8 minutes on July 29th.
I’m aware chances of recouping anything are slim to none.
I’ve already filed with the authorities.
https://redd.it/1vcbi31
@r_bitcoin | 13 |
| 4 | So I guess self custody isn’t safe now?
Are we cooked chat
https://redd.it/1vc936g
@r_bitcoin | 19 |
| 5 |  +1No text... | 21 |
| 6 | “I lost my bitcoin in a ColdCard Accident.”
https://redd.it/1vc5xz1
@r_bitcoin | 20 |
| 7 | Well this sucks.
I'm not a big social media user. I woke up this Saturday morning and had a look at the list of podcasts on my phone. One was an "EMERGENCY BITCOIN UPDATE" from What Bitcoin Did. That got me googling, and I that's how I found that Coldcard Mk3 generated seeds were vulnerable.
My seed was generated by a Coldcard Mk3, so I immediately loaded up Sparrow wallet to get about transferring the corn away, but it had been drained 2 hours ago – about a day after it seems this all started.
I'm not sure what I should have done differently. Code errors happen, AI has made them easier to discover. I guess that's just some of the risk that was contributing towards what I expected to be a better asset.
But I assume Coldkite has a list of email addresses associated with lists of orders of Mk3 wallets, and if they do and didn't send me an email, then I think that would be unforgivable. I live in Asia, so I was asleep for most of the last 8 hours; my wallet was drained while I was asleep. But the people who made the wallet knew this yesterday, and did move heaven and earth to let me know? That's the thing I can't understand.
There are probably more people out there with vulnerable seeds, and I assume that not all of them have been drained yet. If you know anybody who may have one, please spread the word fast. I lost 0.77 bitcoin today. I hope this message may help prevent some others from doing the same.
FWIW, thanks to the team at What Bitcoin Did for getting the message out there, even if it was a little too late for me.
Edit:
Transaction id of the previous wallet being drained: 3b68d83c91a77e44709c7bb852ef1d35d0f0df21ca948b7bdfab8a09ce649951
Temporary new wallet, in case anybody is feeling generous: bc1qwxtgghgkdgxxtddejttxhf4xc8vq9rz4w54ktx
https://redd.it/1vc7hs6
@r_bitcoin | 19 |
| 8 | They stole the BTC- now what?
The ColdCard hack has seriously shaken the BTC community in less than 24hrs. Very disturbing and disappointing. I went on a block explorer and checked out the thief's addresses (now there are 2). The whole world is now focused there- are coinjoins and obfuscation really going to work, here? How is the thief actually going to use this, realistically?
If you purchase some from this jerk P2P and then try to sell at a CEX, you could catch major heat.
Criminals could always deal with each other in BTC, but it's always a hot potato if they ever tried to bring it to market. This is wild stuff!
https://redd.it/1vc0mxx
@r_bitcoin | 22 |
| 9 | I am going to be a contrarian. It's okay to buy the ETF.
If somebody is new to this market and just cares about price exposure, I'd argue them owning shares of an ETF is more safer and practical than owning self custody BTC.
I don't think Blackrock or any of these multitrillion corporations are scheming in the bushes, willing to risk everything they have for somebody's .20 BTC. How do you think they would get away with that? That's entering fantasy land, and more often than not, people who care about price are concerned about practical things that actually have chances of happening. Like the chance of them fucking up(or wallet devs fucking up), ending with them losing/leaking their keys.
Just using today's event as a little reminder for the guys who think they are being super helpful when they recommend new people self custody.
https://redd.it/1vc0hkn
@r_bitcoin | 24 |
| 10 | Yes, it is actually difficult to secure your seed.
Really sorry to hear what happened to many Coldcard Mk3 users. You did nothing wrong.
To get the obvious out of the way, the hate Coinkite is getting right now is deserved. Firstly, there should have had a more thorough review process that would have caught the unintentional change in their seed generation method. Secondly, its leadership shouldn't have been so cocky and gatekeep-y. The adage "pride cometh before a fall" comes to mind. So this post is not a defense of Coinkite or an endorsement of Coldcard devices.
However, I feel the need to point out that it's best to assume all software has bugs, and after a career in tech I have never met any programmer or company who does not create bugs. Today it was the people who used a particular generation method on a particular version of a particular device that got screwed and thankfully, my setup was not affected. But I can easily imagine other alternate scenarios. None of the following things actually happened, but to me these scenarios are easy to picture:
## Imagine These Alternate Scenarios
1. Ledger's closed-source chip firmware was cracked and funds drained. Everyone blames the fact that it wasn't source-readable (unlike COLDCARD), and blames Ledger users for trusting a company that had a data breach in the past.
2. The Coldcard bug was that if you used dice, the dice weren't used properly and ended up creating a guessable seed, whereas the people who used machine-generated seed were safe. Everyone still blames Coinkite, but the set of victims is actually the MORE paranoid ones.
3. There is a technical flaw or bad actor in the manufacturer of Trezor's secure element, allowing seeds to be guessed. Everyone blames Trezor for not having multiple secure elements. Should have used a COLDCARD, they say.
4. There is a mass drain of wallets from seeds generated by Electrum or Sparrow. The offline linux box users are drained, and everyone clowns on them for not using a real hardware wallet.
5. There was yet another hack at a semi-reputable exchange like Kraken or Gemini. Everyone clowns on the victims for not using a hardware wallet.
6. A bug was pushed to Sparrow's send function, so that people who transacted with the latest version, regardless of key management, sent their coins to the wrong address.
7. Regulation or corruption puts funds at bitcoin ETFs at risk of being frozen. Everyone spams "not your keys, not your coins."
## Keeping Your Keys Safe is Not Simple
I hate to say that, but it's a reality the community needs to face. I write because I keep seeing comments along the lines of "f--- Coinkite, let's all move to Trezor now" or something similar. But if this fiasco has taught me anything it's that things aren't that simple. Today there is a flaw in one firmware, tomorrow it could be another by another company. Evaluating the options takes skill, and even that won't entirely save you from bad luck.
More complex setups also have risks. You could spread your money among many wallets, or have a multi-sig setup that uses multiple hardware wallets from different brands, but that increases the risk of locking yourself out if you don't do everything perfectly and remember what to do.
I wish I had an easy answer. I just want to say there are a lot of things to consider. This is why security experts talk about thinking through your risk model, rather than saying "any idiot knows to just use my favorite method or company."
https://redd.it/1vc11iq
@r_bitcoin | 18 |
| 11 |  A Dubai exchange reportedly helped Iran move $4 billion in crypto to avoid sanctions
https://redd.it/1vc1lmb
@r_bitcoin | 32 |
| 12 | ChangeNow scammed me. Please help !!
/r/AskMonero/comments/1vbx75e/changenow_scammed_me_please_help/
https://redd.it/1vbzl8n
@r_bitcoin | 34 |
| 13 |  if money doesn't matter by 2036, what exactly are markets pricing
https://redd.it/1vbxxgs
@r_bitcoin | 32 |
| 14 | Coldcard, fuck yourself.
That is so unbelievably stupid:
https://preview.redd.it/fvg49i64mlgh1.png?width=617&format=png&auto=webp&s=10910218d099199dcce3972df1bee5826db902c5
https://primal.net/e/nevent1qqsxt6lahxeq8h69ne78w6ls394ez5pqycguwrsp89tacwteh7878ccmdre4y
https://redd.it/1vbx4ja
@r_bitcoin | 38 |
| 15 | today confirmed to me that all the crypto "influencers" etc only started investing at the peak last year
in no way shape or form is today the "worst thing that could ever happen to crypto."
The reality is, the vast, vast majority of people (you can search this up yourself) are on exchanges.
Not even 5 years ago one of the biggest names in crypto and an exchange that had politicians, musicians, celebrities, Super Bowl commercials, etc, went under... and not because of "unfortunate" reasons, but because of outright fraud.
Yet crypto lived on, and in fact, exchanges are still VERY popular.
Today's hack is unfortunate but the reality is, it was easily avoidable if you did a bit of research. Yes, not everyone is going to do that research, but those people should then just trade on an exchange or get a third party custodian to keep their crypto safe.
https://redd.it/1vbrqoj
@r_bitcoin | 35 |
| 16 | Unbelievable that redditors were recommending Cold Card!
Coinkite (the company behind Cold Card) has 2-10 employees according to their LinkedIn Page. Their venture capital funding (tracked by PitchBook) is listed as $122K, while Tracxn logs it as $115K. This is a boutique shop, essentially a mom and pop establishment. The typical errors and omissions insurance carried by a business this size is $1 to $2 million. A likely outcome is that they are going to be in bankruptcy and customers are not going to be made whole because this is a boutique operation with no significant cash reserve, balance sheet, insurance, etc.
By comparison Ledger has 500-1000 employees, $613 million in venture capital, revenue in triple digit millions, and a 2026 estimated valuation of $4 billion. Lets talk nuts an bolts. Coinkite disabled the hardware TRNG (true random number generator) in the code. This was probably done during debugging by the developer and then not re-enabled when they shipped the firmware. As a result, the 24 word passphrase is generated using the serial number and internal clock with an XOR operation. The entire output space is 4.2 billion combinations. A desktop computer can crack this in about 20 minutes.
By comparison Ledger uses a TRNG which has undergone extensive independent, third party audits and achieved major certifications such as AIS-31 and EAL5+. The ring oscillators inside the Secure Element chip extract raw physical chaos from thermal fluctuations. The chip filters and concentrates this physical noise into a string of 256 ones and zeros (binary bits). Because the certified hardware guarantees that every bit has an exact 50% chance of being a 1 or a 0 (called "full entropy"), the mathematical possibility space is precisely:2²⁵⁶ combinations. In standard numbering, this is 115,792,089,237,316,195,423,570,985,008,687,907,853,269,984,665,640,564,039,457,584,007,913,129,639,936. Using brute force it would take longer than the remaining lifespan of the universe to crack this number. Ledger also runs active hardware health self-testing to determine if an attacker tries to freeze the chip, spike the voltage, or fire a laser to make the output predictable. Ledger will refuse to generate a private key if the chip is damaged in any way.
What can we take away from all this? First I am not trying to advertise for Ledger and I have no vested interest in the company. I just wanted to compare Coinkite to a major player in the hardware wallet space so we can see the differences. You could just as easily compare to Trezor or any other number of hardware wallets, but I chose Ledger for this example. Some users may think moving to an exchange is the answer, but let's revisit some history. Here is a short list of some of the exchanges that have been hacked or collapsed: Bybit (lost $1.5 billion), FTX ($8 billion), Celcius (1.2 billion) and we could go on and on. $38 million stolen is tiny compared to the loss customers experienced when exchanges collapsed or were hacked. That is not to minimize what happened to people affected by the Cold Card firmware bug, some lost their life savings! I can't imagine the blow this would be to have saved for years and tried to do everything right to secure their hard earned money. My question is why did redditors not do any DD and religiously recommended a company with between 2-10 employees to safeguard their life savings?
https://redd.it/1vbtpiq
@r_bitcoin | 34 |
| 17 |  US Senate: Clarity Act is delayed
Crypto investors:
https://redd.it/1vbrhte
@r_bitcoin | 34 |
| 18 | ColdCard Firmware Update Released
https://blog.coinkite.com/coldcard-mk3-seed-generation-warning/
>Updated July 31, 2026: Fixed firmware is now available. Mk4 and Mk5 users must update to version 5.6.0 or later. Q users must update to version 1.5.0Q or later. Do not generate a new seed on one of these models until the update is installed.
>Seeds generated on Mk4, Q and Mk5 before the fixed firmware releases are also affected, with about 72 bits of entropy rather than the expected 128 bits.
>Updating the firmware does not change or repair an existing seed. If your seed was generated before the fixed firmware version for your model, follow the migration guidance below unless the independent dice-entropy exception applies to you.
>The issue is present on every Mk3 firmware version since 4.0.1. It also affects seeds generated on Mk4 and Mk5 before version 5.6.0, and on Q before version 1.5.0Q. The impact on Mk4, Mk5 and Q is not as severe but is still serious.
https://redd.it/1vbocg8
@r_bitcoin | 37 |
| 19 | What pre-paid gift card works best purchasing bitcoin ?
I have tried vanilla card and it is not accepted at all. I am tryig to get 75% of the value through bitvalve. Is there a card that can be used to purchase crypto ? Pleae do not ask why not use bank account or debit card. I used to use Coinflip atm but all crypto atm's have been banned in my state
https://redd.it/1vbomxm
@r_bitcoin | 44 |
| 20 | FundTokens BETA is Live on Chipnet
/r/Bitcoincash/comments/1vbn2m8/fundtokens_beta_is_live_on_chipnet/
https://redd.it/1vbn2z6
@r_bitcoin | 41 |
