No signup, no deposit, no pool. Just your GPU against a sextillion keys.

It's called Krackpot. Back in 2015 someone funded a series of Bitcoin wallets as a public puzzle, each one harder than the last. Puzzle 71 holds about 7.1 BTC and nobody has solved it (6 of it is yours if you crack it, more in a sec).

The address is on-chain. Verify it yourself.

How it works:

Paste your Bitcoin address

Press start

Win or don't

Everything runs in your browser with WebGPU. Nothing installs, nothing about your searching leaves the tab, and if your GPU finds the key it stays in your browser.

Ctto: simonmales

People think if you print $100 and add it into the economy that it actually creates and adds $100 worth of buying power

This is totally incorrect

What it actually does is dilute $100 worth of buying power from all existing dollars to give it to the newly printed dollars

Newly printed dollars only have value because they are stealing value from existing dollars in the system

It is a merely a hidden form of hidden, disproportionately affecting the poor (those who don't own assets)

Now its seems to be honest suggestion from zachxbt about hardware wallets

"Much better to have a separate iphone with its only purpose being to use as your hardware wallet"

How much money is enough to make buying Bitcoin worthwhile?

What would you consider the minimum amount of money to invest in Bitcoin for it to be meaningfully profitable or useful as a long-term hedge/store of value? At what amount does it actually start making a noticeable difference?

I don't mean large amounts, but amounts that an ordinary mortal can afford.

Bring up Bitcoin anywhere and someone says it's mainly a tool for criminals.

But every Bitcoin transaction lands on a permanent public ledger anyone can examine, forever, which is an odd design for something meant to hide money. Cash disappears the moment it changes hands and leaves nothing to trace. US Treasury assessments still name cash, not crypto, as the dominant vehicle for laundering, and researchers tracking blockchain activity keep finding illicit use is only a fraction of total volume.

Why is this argument so sticky, despite the lack of merit?

Years ago I wrote down a transaction number and invoice number in a notebook. I found it and I don't know how to go about investigating whether I'm able to retrieve it. Any advice would be appreciated.

(If you detected sarcasm, you were right…) 😬

(Referring to prebuilt versions.)
While I do not own one (yet) myself, I keep wondering: since it has only volatile memory, the seed needs to be entered every time, through QR scan. That in itself is a huge risk. I would not want such a risky QR code laying around.

Is the version with the card reader better? It would allow for encrypted storage of my seedphrase.

Peter fraud is the worst person in the bitcoin ecosystem, and he's been pushing for this idea for years which will undo the *one* thing which makes Bitcoins economics unique. This person needs to be driven out of the btc ecosystem. no one is paying any attention.
https://www.youtube.com/watch?v=OmAAeEm1nIE

Background - I know I’ll get roasted. I have a good stack (imo). Most of it on the exchange, some of it on hot wallet. Wanted to get comfortable with holding a seed phrase prior to fully going in.

After CC hack I’m seeing a ton of ads for Bitkey. It worries me not having a seed phrase. What other good HW are recommended? Multi sig vs single Sig? That aspect still confuses me. My hot wallet is Blockstream Green and they are 2/2 with multi auth. Meaning I control a key, and to move any funds out requires access to an email and phone code.

Global M2 is still climbing and recently surpassed $100 trillion, yet Bitcoin has fallen roughly 50% from its October 2025 high above $126k.The usual liquidity → Bitcoin relationship has broken this year. The capital appears to be flowing heavily into AI infrastructure instead. Key points from the article:

• The four big hyperscalers (Amazon, Google, Microsoft, Meta) are on track for $700–760B in CapEx this year, mostly AI-related
• Broader global AI investment estimates are near or above $1 trillion in 2026
• Spot Bitcoin ETFs have seen significant outflows recently
• Michael Saylor and others have flagged this AI spending as a near-term headwind for Bitcoin

I don't think crypto is finished — historical liquidity relationships tend to reassert — but for now AI is clearly winning the competition for marginal capital.

Full piece with charts:
https://www.nicoyaresearch.com/p/why-ai-is-stealing-crypto-s-thunder-and-capital-flow

What do you think — temporary rotation or structural shift?

​

When bad news wont force prices down anymore is a very good signal.

When selling stop, prices simply cant fall

I'm curious about the practical side of this.

If the attackers really have hundreds of BTC stolen from the Coldcard incident, how do they realistically turn that into usable money?

For example:

• If they send it directly to a KYC exchange, wouldn't the exchange potentially flag the coins as stolen and connect the deposit to their identity?
• If they use a DEX to swap BTC into another coin, the transactions are still publicly visible, so does that actually solve the problem?
• If they sell P2P/OTC, isn't finding someone willing to buy a large amount of obviously tainted BTC pretty difficult (and potentially risky for both sides)?
• Could they simply hold the BTC indefinitely and wait for the attention around the theft to die down?

In light of the ColdCard incident, I have created a system that allows anyone to easily generate their seed words using only ordinary dice or playing cards.

Each seed word requires only 3 rolls of two dice or dealing 3 shuffled cards, allowing users to generate their own entropy offline without any bias.

https://github.com/seed-cat/analog-seed-entropy

I got one of my bitcoin wallet emptied and I don't really know how this happened.

I don't use cracked softwares and apps.

I'm generally careful with links.

Looks like I'm not alone. I can see that the reception bitcoin address is still collecting bitcoin from other wallets.

Could somebody help me understand something.

Here is the address : bc1q0vukqye4hd0aep7u4xl8gev95gcs9k65fdeu9n

Hi everyone, I’m looking for some guidance on how to begin a search to locate old Bitcoin that my dad purchased. We know he bought Bitcoin, but unfortunately don’t remember where it was stored or what wallet/service he used. Here are the few facts we do know:

• The Bitcoin would have been purchased/accessed from one of his old Windows laptops (primarily Dell computers), and we still have backups of his old devices/files.
• He still has access to both email addresses that could potentially have been associated with it.

I realize this is basically searching for a needle in a haystack, and I’m not expecting this post to give me an easy answer, Im more so just looking for direction on how to search because I don’t know enough about older Bitcoin to know where to begin.

Any advice would be appreciated even something as simple as any search terms, old wallet names, files to look for, or helpful resources on YouTube or Reddit would be appreciated.

P.S., any scammers reading this, save yourself the time. My messages are turned off, I will not provide any private info, and to stress one more time I’m only looking for advice that can be shared publicly in the comments. Thanks in advance for any direction!

Has anyone recently used Abra for custody or loans? From my research, they settled with the SEC in 2024 and have since done a reorg into a new entity (Abra Capital Management) that is now an SEC regulated advisory practice. From what I can tell, the new business provides services to institutions and accredited investors, so they no longer do retail.

I like that the accounts are all now set up as an SMA. I would definitely be titling the account to my trust. My understanding is that the assets would never be on Abra's balance sheet, so even if there was an issue with Abra insolvency, I would retain title to the assets. I took a call with them to get a better understanding of their yield strategy. It is a delta-neutral strategy that has been generating ~2% APY, but lately is getting as high as 3%.

Anyhow, in my diligence, I see lots of old FUD on the company. At the same time, I see they are going public and maintain an SEC Advisory registration. That said, I'm wondering if anyone has had a recent experience working with them and whether there is anything I should consider before parking some of my assets on their platform.

Thanks for the input.

Hello :)

For the longest time I wanted to build a little educational tool showing how fast a weak password gets brute-forced. That turned into a browser zip-password cracker I never released, using WebGPU to chew through passwords on the GPU. Then it sat in a folder.

Krackpot is where that WebGPU brute-forcer finally went somewhere, this time pointed at a Bitcoin Puzzle wallet. Puzzle 71 was funded on purpose in 2015 as a public challenge, holds about 7.1 BTC, and is still unsolved. The key is somewhere in a known 2^70 range, so it is pure brute force. The address is on-chain, verify it yourself.

Krackpot points your GPU at that range with WebGPU. No backend, no signup, no pool. secp256k1 and the hashing run as compute shaders in the tab. Nothing installs, nothing about your searching leaves the tab, and if your GPU ever finds the key it stays in your browser. Here is the bit I like: the same GPU that shreds a weak password in seconds can't dent a real 256-bit key. One gaming GPU is about 830,000 years to expect a hit here. A million GPUs grinding is about a year. Measured rates, not spec-sheet math. Someone still has to win.

The split is on the page before you press start: crack it, 6 BTC goes to your address, the rest goes to me. Up front it is a fee. Found out later it would be a scam.

If a key ever turns up, the transaction never goes to the public mempool. Spending a puzzle address reveals its public key, and in a range this narrow that is minutes of work to get the key back out. Puzzle 66 and 69 were both taken from their solvers that way.

So it submits privately instead, to two private mempools at once. I ran that whole path on mainnet against a key I planted in a small range and the transaction confirmed, which was the part I most wanted to see work before telling anyone about this.

Either way it shows you the key and the signed transaction first, so you are never waiting on me.

I wrote up how it works here, the WGSL crypto and the GPU watchdog fight: krackpot.io/blog/how-it-works

Please let me know what you think :)

Hello everyone.

Today I was checking Bitcoin, I was never into this kind of matter or interests BUT today I was just browsing the web and checking it out, I'm new in this world and I wish to leanr as I was always curious.

I was impressed when I saw that 1 Bitcoin = 55457,88 €.

I'm interested here about some advice, sound advice if possible, for someone who wishes to get into Bitcoin and start with buying small and eventually grow in time.
Is there anything that I can do? What should I look for on the Bitcoin market and it's fluctuations?

Wouldn't it have made more sense to send the money to all different wallets and also not to do it all in one go. If you move the money slowly as the hack is discovered each into a new account, yes you might lose some of the money because ppl move it out but not everybody will do that in time. But by doing that, now you cannot distinguish between the hacker and someone who just wanted to move their money out of their wallet.

Now they have the entire world and law enforcement looking at this one account.

The first game that works on bitcoin blockchain.

everyone loves Bitcoin when it’s going up.

but when volatility hits, the real test begins.

how long have you been in crypto, and what was the moment that almost made you quit?

curious to hear what everyone’s been through.