The most common question I am getting right now in the fall out of the news of COLD CARD MK3, MK4, MK5 and Q having compromised entropy, is: "Rob, what would you do right now if you were in my shoes? Where would you send your bitcoin to be safe?" I will share with you my list of what I would do, but first, there is AN URGENT SECURITY ADVISORY IN THE BITCOIN ECOSYSTEM. Below is my personal assessment of the situation. If you or someone you know: Uses an MK3, MK4, MK5, or Q in a single signature OR A multi signature wallet where the cold card devices can move the funds on their own (Example, 2 cold cards and a Ledger). Please continue reading. You may be in danger. If this does not apply to you, keep on reading if you like, but you are not impacted by this issue. If you are still here, there are three identified mitigations that protect you at the moment. They are all different forms in which you may have brought your own entropy. A: DICE - This is done by either rolling dice from the start, or adding dice rolls to the generated seed phrase. At least 50 dice rolls would be my threshold at 128 bits of entropy. OR B: PASSPHRASE - You used a passphrase of sufficient entropy (128 bits). 128 Bits of entropy pass phrase examples include RANDOM combinations of the following: - 12 BIP 39 seed words. - 10 common words in the english language - 25 mixed lower case letters and numbers - 20 if you use ASCII characters Note on pass phrases: This does not include the same word 12 times, 10 words in a sentence, etc. This combinations of characters/numbers OR words should never have been seen or spoken before in the total sum of all human knowledge and experiences. It needs to be RANDOM for it to be entropy. OR C: EXTERNAL ENTROPY - Your seed phrase was derived entirely outside of the cold card ecosystem. (It was imported into the cold card, not generated on it) Now, if you are still reading, and you do not have any of these mitigations in place, you need to move your funds. The urgency of circumstances are as follows: TIER 1: AS SOON AS POSSIBLE Scenario A: If you are in a signature wallet with an effected device, and did not use any of the mitigations listed above. You need to move funds right now. Find someone to help you, any moment your funds can be stolen. Scenario B: If you have an N of N (eg 2 of 2, 3 of 3, etc) multisig of just cold card devices that did not have mitigations listed above (dice and/or passphrase). Attackers will be grinding all of the combinations of compromised keys. They know all your seed phrases. You are compromised. It is just a matter of time for them to assemble the puzzle pieces together and steal your funds. If this scenario is you, I will have more below on how to mitigate risk when broadcasting your transaction. TIER 2: URGENTLY If you are in a single signature wallet with an effected device, and you used either less than 50 dice rolls OR a pass phrase less secure than what I shared above. The entire security of your bitcoin is reliant on how much of Dice AND Passphrases you applied to your wallet. Attackers know your seed phrase. Your entropy from dice or pass phrase is the only thing protecting you. Did you add a pass phrase of 'bitcoin'? You are basically in tier 1. Did you use 6 words? You are not at tier 1, but you aren't safe. You need to make plans to move funds quickly. TIER 3 SOON, BUT IMPORTANT CONTEXT: You have a multi signature wallet where the compromised devices have sufficient ability to move the funds. An example is a 2 of 3 multisig where you have 2 cold cards and another signer. The issue with Tier 3 is that an attacker may have already figured out your insecure seed phrases. This means when you broadcast your bitcoin transaction, an attacker in theory can then steal your funds. NOTE: IF YOU ARE IN THIS SITUATION, AND YOU HAVE REUSED ADDRESSES, ALL REUSED ADDRESSES PUT YOU RIGHT BACK AT THE TIER 1 MOVE RIGHT AWAY YOUR FUNDS ARE AT RISK AT THIS VERY MOMENT You should look into finding a way to use the @MARAFoundation_ slipstream service, which uses a private mempool. This means that by the time an attacker could see your attempted recovery, it is already in a block and not possible for them to steal funds. TIER 4: KEY ROTATION. This is where you have an insecure cold card(s) in your multisig quorum, and you know that the other keys in your quorum are not impacted by this bug. If there is a MK3,MK4,MK5 or Q in the quorum, BUT they either: 1. Rolled sufficient dice (50 min) 2. Have a strong pass phrase (as defined above). 3. Used entropy not sourced from the device, they are not impacted by this bug in the Cold Card (see notes earlier on mitigations). You are in a position where a minority of your keys are compromised. Funds are safe, but you are at reduced security. Make plans when you are able to remove the compromised device from your wallet. Now. With that security advisory out of the way, back to the question, what would I do in this situation? Below is just my opinion, but you should not rely on only my opinion, you will have to make your own choices based on what you feel is best for you. I want to be clear, if you are not on this list. It is not that I think your product/business is bad, insecure or at risk, I am directly answering the question of what I would do. This is my personal judgement given my decade of experience in bitcoin. First, a disclaimer: My bitcoin is at my company @AnchorWatch. I have full skin in the game in that if I'm offering a custody solution, there will never be another place I store large amounts of bitcoin long term for myself or my family, and it will be this way as long as I am here. I was the first bitcoin that went on our Trident Vault platform. If the day ever comes, I will be the last bitcoin to leave the platform. The years of what we built at AnchorWatch were for exactly moments like this. Avoiding catastrophic risk of ruin scenarios. We offer 2 products: 1. Our Flagship Product where you as the customer can hold 1 or 3 keys, and we act as a cosigner. We leverage bitcoin native smart contracts which allow for your bitcoin to have different ways it can be spent across time. 2. Multi Institution Custody, where we let you distribute your keys across 3 institutions of ourselves, @bitgo and @CoinCorner. 2 of the 3 institutions must sign off on the transaction, and you have to present a Yubikey signature before withdrawing to mitigate deepfake and compromised accounts. For both products as, since we are a cosigner, we are able to enforce rules like whitelisted addresses, and velocity controls (how much bitcoin can you send how often). You can even disable the send button on the platform if you so choose! We also offer 1:1 insurance backed by Lloyd's of London. If you want to learn more about what we do, hit up @_joerodgers or @BeccaAmilee to learn more, or check out our website. Now with that out of the way, places where I'd leave my bitcoin (besides @AnchorWatch) in no particular order: Custodian: I'd trust my life savings at @River under a duress situation. This is one of those times. @Leishman and the entire team at River are elite operators. It is my favorite bitcoin services business in the market today outside of my own. They own their own custody infrastructure, and at times like this, you want those who have extreme ownership and control over how their customer's money is being managed. @River does monthly proof of reserves, and you can turn on the force field feature which will freeze withdrawals of bitcoin. They have a world class custody team as well, and are making improvements regularly with a larger upgrade that has been planned for a long time, happening later this year. Collaborative Custody: 1. The @Bitkey is an incredible product with an elite team of engineers supported by the @BlockEng organization. They have exceptional bitcoin developers across @spiral_xyz and @CashApp teams who deeply understand Bitcoin. @jack has been a long time believer in bitcoin who has built an organization that has no peer in the resources they have not just understanding bitcoin, but building on bitcoin. You can pick it up a Bitkey at best buy today! I do want to add a disclaimer that all keys are managed within the Bitkey ecosystem. The Bitkey team has gone to great lengths to keep things secure, but in light of recent events, I want to call that out. At the moment, the Bitkey is my only exception to a purist ideal of multi vendor multisig (more below). 2. @CasaHODL - @Nneuman and @lopp have been on top of this incidence response, and have built a very clean user experience to let people be safe. You can either use a 2 of 3 or 3 of 5 multisig with a great mobile app. Casa is the best UX for soverign collaborative multisig that exists in the market today. 3. @uncahined - Unchained pioneered the collaborative custody model and the multi institution custody model. They have been working around the clock trying to support customers and have even been able to use slip stream going the extra mile on short notice to keep customers bitcoin safe. Self Custody: I have spent close to $5k on LLM tokens over the past 24 hours scanning over a hundred bitcoin related repositories. As of now, I have seen no vulnerability that has me concerned about any hardware device outside of the Cold Cards. Even so, you can't be sure. So I would follow the @mflaxman "Bitcoin 10x security guide". Its how I held my bitcoin before I founded @AnchorWatch, and even though the guide is 6 years old, the principles are timeless. I would remove his suggestion of using the cold card and replace it with any other hardware wallet. I would replace the cold card with a @Ledger at this time if it were my decision. You can pick up a Ledger up at Best Buy in the US. Michael pioneered multi vendor multisig as a concept, and if you want a fully sovereign solution, as of today there is no better mental model on how to think through this, he has advanced tabs to further increase the security. For his cold card guide he fairly calls out the added benefit of rolling dice, which would have saved you today. I think the future is combining the tech we use at @AnchorWatch to move beyond the single signature/ multi signature paradigm of custody, with the principles of @mflaxman's 10x security guide and the support of collaborative custody. More on that later, but I would check out @lianabitcoin from @Wizardsardine as well, they offer a fully open source wallet that enables these more advanced smart contracts and are security researchers in the bitcoin ecosystem. With that, I'm going to get back to work. I will post a followup reply if I have additional information or any corrections or clarifications to make.

Name & Symbol: River ($RIVER)
Address: 0xda7ad9dea9397cffddae2f8a052b82f1484252b3

COLDCARD Mk3 Security Advisory If you generated a seed on a Mk3 after firmware 4.0.1, your funds may be at risk. Mk4, Q and Mk5 are not affected based on our early analysis. Read the advisory and migrate carefully: https://t.co/3vgPHOjMS7

Name & Symbol: Quack AI ($Q)
Address: 0xc07e1300dc138601fa6b0b59f8d0fa477e690589

🇭🇺 HUNGARY AXES DRACONIAN CRYPTO VALIDATOR RULES 🔸 Parliament repealed the July 2025 mandatory validator on wallet ownership and asset sources. 🔸 The rule ousted Revolut, eToro, CoinCash, MoonPay and Strike. 🔸 Existing MiCA compliance and AML requirements fully remained. https://t.co/9dK5S4qeuH

Name & Symbol: StrikeBit AI ($STRIKE)
Address: 0x2aa89a0113bcbbcdc5812c6df794e2d9650fc1af

There was a recent conversation between @saylor and @_DannyKnowles that is bringing up a bit of notice because of Saylor’s presumed anger. I’ll comment. Any affect, other than a sigh, from Saylor is so notable only because he normally does such a good job of keeping cool in the face intense attacks by media. This was very different for him so it stands out. People are assuming that this was an overflow of feelings on his part, that somehow his affect breached his control. It is possible that he was having a bad day but I think it much more likely that this was deliberate and calculated. The background is that Danny has a very important bitcoin platform and is good friends with @_Checkmatey_ who he frequently has on and mentions to other guests. They have both been critical of Bitcoin treasury companies and used the term “Ponzi adjacent”. Saylor has faced many people more powerful than himself in both New York and DC. He has put his retirement on hold for an advance to humanity that he sees as important. One could say that, of course, he’s going to benefit from his own efforts, but to be truthful, six years ago before he bought his first bitcoin, he had enough to live the rest of his life in any way he chose without putting out another second of effort on behalf of anyone else. Instead, he saw a better future for humanity and has dedicated himself to advancing bitcoin for everyone. I think this was a calculated wake up call to all those people involved with bitcoin who maintain a fiat mindset, such that the immediate price matters more than the long-term advance, that the greatest critics are finally moving our way while they themselves are sniping at people who are working for our future. It is common in human relations for people to be more angry with and more critical of people with positions close, but not identical, to their own then they are with people whose positions are quite opposite to theirs. I think he is aware that he gets more criticism from bitcoiners than from tradfi. Now one might ask why Saylor would choose to go off when he has held his temper in so many more adversarial interviews. Partly, I think it is because it was so shocking and got our attention. Another reason is that he’s reminding us he’s home. You argue more vociferously with your brother than you do with your adversary at work. You let your guard down among family. Partly because they are close, partly because you care. While this was a public interview, I think he let his guard down and showed us an aspect of reality he doesn’t usually show the public to remind us that we are all in this together and we are home. If Danny knew it was coming, that would be terrific and if he didn’t, he did an outstanding job handling it. What Danny does on a weekly basis is wonderful and what Michael has built is incredible. Most people on this app do not remember the days when someone such as my mother could have her retirement funds in a safe place earning 7% and be provided enough for life with dignity. Most people here have grown up in a very low interest rate environment, and don’t realize on a daily basis the loss of human dignity that has come from the last few decades of monetary policy in this country. In reestablishing a widely available credit market backed by a hard money, Mike is providing people who will never be able to handle a seed phrase with the benefits of bitcoin and a life they would not otherwise have. I applaud him for what he has built and thank him for his continued efforts. I dictated most of this so please accept my apologies for any misspellings or non-Sequiturs. I hope everyone has a good day.

Name & Symbol: Popcat ($POPCAT)
Address: 7GCihgDB8fe6KNjn2MYtkzZcRjQy3t9GHdC8uHYmW2hr

The cost of living had begun to spiral out of control. What was to be done? Casting around, people found a life raft: shares. Every day the entire population studied the stock market listings. Sometimes some shares collapsed and thousands of people hurtled toward the abyss. In every shop, every factory, every school, share tips were whispered in one’s ear. -1923 Germany in the book Defying Hitler by Sebastian Haffner This is the mindset behind sh*tcoins and the wipeouts on them yesterday. These “assets” are just reflections of something terrible that’s happening to money, and as a result, to society. They have no connection to BTC, other than to show the need for it. No sh*tcoins. No leverage. Always understand who your co-investors are in an asset; are they sane, or are they reckless? Harvard bought BTC, not Fartcoin.

Name & Symbol: Fartcoin ($Fartcoin)
Address: 9BB6NFEcjBCtnNLFko2FqVQBq8HHM13kCyYcdQbgpump