Yesterday several Bitcoin ETF launched in the US and had a trading volume of 4.6 billion USD. I think we can all see that this is market changing volume since people that traded the Bitcoin ETF are probably not yet invested in Bitcoin. Interestingly the huge volume was not represented on popular bitcoin exchanges, which made me wonder where the bitcoins are actually being both/sold. Does somebody has information about that topic?
Do you think that overnight/weekend gaps from the ETF are potential trading opportunities? In my mind there should be huge gaps, if for example the bitcoin price changes a lot over the weekend.

On the 2nd November ten years ago I registered on bitcointalk. I was fascinated about the idea of decentralization and that everyone could be a part of the network. At that time I was just 16 years old and liked bitcointalk on the one hand because there was an incredible amount of meme shitposts and giveaways (bitcoin giveaways and not shitcoin drops like today), but on the other hand I was fascinated that random strangers on the internet would basically answer every question that could potentially arise about bitcoin.
Over the years bitcointalk has change a bit and has grown into a more professional platform, even if at the same time it has lost some very great minds (and found some). My wish for the next ten years would be that we can keep this platform as it is and at the same time are able to preserve all this knowledge that was stored here for the last years (since for now it mostly depends on active, well educated users answering questions).
My wish for bitcoin however is that we can have as much adoption as possible since even if not everyone thinks the same, for me this is the most important step for the long term success of a decentralized payment system.

After searching for a good way to gift bitcoin I stumbled on card wallet. Since it does have some unique features I thought I would share it with the community.
Basically it is a fancy paper wallet that is printed by the official Austrian State Printing House (they usually print the official ID Cards, Driving Licenses, etc.). This means that you basically get a passport that simply holds wallet data instead of your personal information. It is possible, because the Austrian State Printhouse was privatized some years ago and can now also do non-governmental printing on the same security level as they usually print passports.
The downsides with (paper-)wallets like this (for example also the legendary casascius coins and others) are  obvious however.  You trust a third party with the creation of your wallet. This means in general that you can for one not be shure that the private key is not known to anyone and secondly any mistakes that are made will only be visible once you want to spend the coins. After some research I found out that they have a special device that creates and prints the private keys and instantly seals them. This way avoids that (mostly) anyone can track the private key during the creation process. How much you however want to trust this process is your own choice. For me it is good enough to use card wallet to give medium amounts of Bitcoin away to family and friends. The card looks very beautiful and the Austrian State Printing House is probably the most professional and trustworthy company in this moment that does  offer a service like this. Especially if you consider that all the people that work there are carefully selected and monitored since they print official state documents.
For long time storage on this wallet I’m to paranoid however. This is especially since I can not do a backup of the card wallet. This means in case of fire ore any other desaster the coins would be lost.
For this reason my wish would be that you could buy two wallets that do hold the same private keys, so you could store them in different locations. This should however be clearly marked on the wallet so people don’t get scammed if somebody sells them just one of the copies.
In any case I found the perfect wallet to gift to somebody, so that they can read all the documents that come with it and spark their interest in bitcoin.

Link: https://www.cardwallet.com/en/home/

I have seen more and more people with that a red tag on their post saying „This user is a suspected spammer!“. However I can not find any negative trust or anything like this on their profile. Is this a new feature of the forum and how do people end up with that kind of tag?


Edit: Actually it seems that also I have this tag   (Which is funny since I have done about 1.3K posts in 10 years on this forum which does not seem a lot)

To pay with bitcoin was always my favorite use of bitcoin. Since it should be easy and fast the best Solution would be an implementation in Apple Pay. Is there a way to do that or could it be done in the more open Android Pay envoirment? I heard that apple will open nfc to 3rd party applications soon.

Edit: What I propose is not to put bitcoin on a MasterCard or something. I want to create a shortcut to blue wallet so that you can spend bitcoins that are stored locally on your phone directly and easily with "Apple Pay" in the sense that you just need to "tap and go". No need to unlock your phone, no need to open the app, no need to insert bitcoin address. Just simple tap and payment is done.

[There is always a certain risk of fire!]

I. Introduction
This guide is intended for anyone interested in heating their home with the waste heat from a Bitcoin miner. In the meantime, used ASIC miners have dropped in price so much that they have become attractive as a replacement for electric heaters. The advantage of a Bitcoin miner compared to an electric heater is obvious: Not only does it generate almost the same amount of heat as a heater, but it also allows Bitcoin mining. A well-suited Bitcoin miner for such an undertaking is the Antminer S9, which has become increasingly affordable in recent times and is now available for under 200 USD. (Even under 50 USD if you buy in large quantities)

II. Necessary changes
1) Brains OS+
By default, the Antminer S9 outputs 13 TH's and requires 1300 watts of power to do so (= approx. 1300 watts of heating power). In this standard configuration, however, the miner can only be used for heating to a limited extent, as it is extremely noisy. Only the heating of an uninhabited building comes into consideration here.
However, if the Brains OS+ software is installed, the power consumption can be controlled precisely. Up to a power consumption of about 600 watts, the included fans have to run with only 1% (!) of the maximum speed in my case. The noise development is accordingly very low. The miner still performs about 7.5 THs at this power consumption.
What bothers me about Brain's OS+ is the fan behavior at startup: The fans briefly turn to 100% and only turn down after about 15 seconds. This behavior is due to the design and cannot be controlled via the software. (Link to the topic: https://bitcointalk.org/index.php?topic=5417649) However, this is annoying if the miner is to be switched on and off frequently, which is necessary to be able to regulate the temperature reasonably.
Note: Brains OS+ will take a small percentage of your hashrate as "development fee". You can find more informations and alternative software in the forum.

2) External fan control
If you want the fans to run with 1% of the speed already at startup, you have to modify the miner further. For this purpose an external fan controller is used. I chose this one: https://www.amazon.de/MEIRIYFA-Adapter-Chassis-Splitter-Controller/dp/B09MN4BMPK/ref=sr_1_11?keywords=Pc+Fan+Controller+Pwm&qid=1670259225&s=industrial&sr=1-11 . This can be connected directly to the existing power supply with a 6 pin splitter.
In the Brains OS+ software, "Immersion Mode" is now selected and the correct fan speed is set using the knob on the fan controller. The fan speed is now fixed to this value and is immediately applied as soon as the miner gets power. Since the control can now no longer take place dynamically, the miner shuts down at the "Hot" temperature set in Brains OS+ for safety.
I (and many others) used their miner successfully with Brains' third-party software. However, I cannot guarantee that the software will shut down the miner reliably. If the miner does not shut down when the temperature is exceeded, there is a significant fire hazard!

3) Modified fans
Lastly, the fans of the miner can be replaced by using the separate fan control and using the "immersion mode" in Brains OS+. The Fan Control is needed, because  without it the miner will stop to run due to an error message. However, I have not been able to gain any experience here yet, as the only fans I currently have available are too weak for the Antminer. If anyone here has any experience, feel free to share it.
The fan of the power supply can also be replaced. But you have to be very careful, because the power supply has to be cooled very well.

III. pictures

The fan control in detail:



In this case you can see an example on how you can integrate this setup, but keep in mind that a very good air flow must be maintained at all times!




I hope I could help some of you with this little guide, who are thinking about using a Bitcoin Miner instead of an electric heater. It is important to make sure that the Bitcoin Miner does not exceed the prescribed temperatures and is well ventilated. Everyone has to decide for himself if he wants to run a Bitcoin Miner unattended permanently at home. There is always a certain risk of fire!

Sehr interessanter Beitrag zu Bundesbehörden und Kryptowährungen. Das Bitcoins, etc. ja immer mal wieder beschlagnahmt und dann auch wieder verkauft werden, sollte nun nicht mehr neu sein. Laut den News haben aber auch einige Bundesbehörde Bitcoins über Bitcoin.de regulär gekauft. Leider steht zu den Gründen nicht mehr in dem Artikel.

Quelle: https://www.spiegel.de/netzwelt/web/kryptowaehrungen-so-viele-bitcoins-besitzen-die-bundesbehoerden-a-13e9f164-72cc-4eee-a277-58ee9cdf0ba9

Every few days I see postings about new places accepting bitcoin for daily payments. It is basically always a small (usually not very digital looking) store in Africa. I really like that this is happening and I am wondering what are the experiences of users from Africa.

Is it really common to use bitcoin in the everyday payment?
What types of wallets do people usually use to complete these transactions?
What are advantages/disadvantages of bitcoin payments in Africa?

Day by day the bitcoin price is declining. It seems that the price these days is largely dictated by miners that constantly sell coins and investors that hope for future profits. That is also what most topics in this forum are about. What I see less and less are post about how bitcoin can be used for its intended purpose that is "A purely peer-to-peer version of electronic cash" to send "online payments (..) directly from one party to another".
Are people even willing to still follow these idea or is bitcoin doomed to be a place for profit gamblers that will slowly loose its relevance?

From what I have understood, a bitcoin miner that is connected to a pool, will constantly solve shares and submit them to the pool. Once a miner finds the "golden" share that is more than the current difficulty the pool will be rewarded with the block. The block is shared based on the reward system, wich will reward all miners for their effort, even if they just contributed worthless shares for this block.
Now my idea (that I hope somebody can explain why it won't work) comes to play. What if you would recode the mining software, that all your "worthless" shares, that still get paid if somebody else finds a block, are directed to a mining pool and if you would find the "golden" share that solves the block it will get recognized and sent to a solo mining block instead. Is this possible? 

[Eine gewisse Brandgefahr besteht sicherlich immer!]

I. Einleitung
Dieser Guide richtet sich an alle die Interesse haben, ihr Haus mit der Abwärme eines Bitcoin Miners zu beheizen. Mittlerweile sind gebrauchte ASIC Miner so stark im Preis gefallen, dass sie durchaus nicht unattraktiv als Ersatz einer elektrischen Heizung geworden sind. Der Vorteil beim Bitcoin Miner gegenüber der elektrischen Heizung ist offensichtlich: Es wird aus dem eingespeisten Strom nicht nur beinahe die selbe Menge Wärme wie bei der Heizung erzeugt, sondern eben auch Bitcoin Mining betrieben. Ein gut geeigneter Bitcoin Miner für ein solches Unterfangen ist der Antminer S9, welcher in der letzten Zeit immer günstiger geworden und mittlerweile für unter 200 Euro zu haben ist.

II. Notwendige Veränderungen
1) Brains OS+
Standardmäßig leistet der Antminer S9 13 TH's und benötigt dafür 1300 Watt Strom (= ca. 1300 Watt Heizleistung). In dieser Standardkonfiguration lässt sich der Miner jedoch nur bedingt zum Heizen verwenden, da er extrem laut ist. In Betracht kommt hier lediglich das Heizen eines unbewohnten Gebäudes.
Wird jedoch die Software Brains OS+ aufgespielt, lässt sich die Stromaufnahme wattgenau steuern. Bis zu einer Stromaufnahme von ca. 600 Watt, müssen die mitgelieferten Lüfter bei mir mit lediglich 1% (!) der maximalen Geschwindigkeit laufen. Die Geräuschentwicklung ist entsprechend sehr gering. Der Miner leistet bei dieser Leistungsaufnahme noch etwa 7,5 THs.
Was mich an Brains OS+ stört ist das Lüfterverhalten beim Start: Hier drehen die Lüfter kurz auf 100% und regeln erst nach ca. 15 Sekunden herunter. Dieses Verhalten ist Bauartbedingt und lässt sich nicht über die Software in den Griff bekommen. (Link zum Topic: https://bitcointalk.org/index.php?topic=5417649) Dies ist jedoch störend, wenn der Miner zB häufiger ein und ausgeschaltet werden soll, was notwendig ist, um die Temperatur vernünftig regulieren zu können.

2) Externe Lüftersteuerung
Sollen die Lüfter beim Start direkt mit 1% der Geschwindigkeit laufen, muss der Miner nun also noch weiter umgebaut werden. Hierzu wird eine externe Lüftersteuerung benutzt. Ich habe mich für diese entschieden: https://www.amazon.de/MEIRIYFA-Adapter-Chassis-Splitter-Controller/dp/B09MN4BMPK/ref=sr_1_11?keywords=Pc+Fan+Controller+Pwm&qid=1670259225&s=industrial&sr=1-11 . Diese kann direkt mit einem 6 Pin Splitter an das vorhandene Netzteil angeschlossen werden.
In der Software Brains OS+ wird nun der Immersion Mode ausgewählt und die richtige Lüftergeschwindigkeit über den Drehregler an der Lüftersteuerung eingestellt. Die Lüftergeschwindigkeit ist nun fest auf diesen Wert eingestellt und wird sofort angewendet, sobald der Miner Strom bekommt. Da die Regelung nun nicht mehr dynamisch stattfinden kann, schaltet sich der Miner bei der „Hot“ Temperatur welche in Brains OS+ eingestellt ist zur Sicherheit ab.
Ich (und viele andere) benutzte ihren Miner erfolgreich mit der Drittanbieter-Software von Brains. Dennoch kann ich natürlich keine Garantie dafür abgeben, dass die Software den Miner auch zuverlässig abschaltet. Schaltet der Miner bei Übeschreitung der Temperatur nicht ab, besteht eine erhebliche Brandgefahr!

3) Modifizierte Lüfter
Zuletzt lassen sich die Lüfter des Miners durch die Verwendung der separaten Lüftersteuerung und der Nutzung des "Immersion Modes" austauschen, ohne dass der Miner wie normal aufgrund einer Fehlermeldung angehalten wird. Hier habe ich jedoch noch keine Erfahrungen sammeln können, da die einzigen Lüfter welche ich momentan zur Verfügung habe, zu schwach für den Antminer sind. Wenn hier jemand Erfahrungen hat, kann er sie gerne teilen.
Der Lüfter des Netzteils lässt sich ebenfalls tauschen. Hierbei sollte man jedoch sehr vorsichtig sein, da das Netzteil ebenfalls ausreichend gekühlt werden muss.

III. Bilder

Die Lüftersteuerung im Detail:



Zwar unauffällig in den Raum integriert, jedoch nicht optimal aufgrund der schlechten Belüftung:




Ich hoffe ich konnte mit dem kleinen Guide dem ein oder anderen helfen, der sich überlegt statt einer Elektroheizung einen Bitcoin Miner zu betreiben. Wichtig ist, darauf zu achten, dass der Bitcoin Miner steht die vorgeschriebenen Temperaturen nicht übersteigt und gut belüftet ist. Jeder muss selbst entscheiden ob er einen Bitcoin Miner unbeaufsichtigt dauerhaft bei sich zuhause laufen lassen möchte. Eine gewisse Brandgefahr besteht sicherlich immer!

With twitter changing its identity after Elon Musk bought it, it seems that crypto is (besides NSFW topics) the most growing topic at the platform. Lets see how this will impact the crypto scene and also if there will be an impact to bitcointalk.org
Link: https://www.reuters.com/technology/exclusive-where-did-tweeters-go-twitter-is-losing-its-most-active-users-internal-2022-10-25/

Is there a way to stop the fans (Antminer S9) from going to 100% at startup. I use Braiins OS+ and have the noise level very low because I use only 600W. Since I need to restart the miner quite a few times depending on availability of power, this would be very helpful.

Im looking to buy a miner that has no more than 100 Watts of power draw for solo lottery mining. Do you know any old models that are cheap to get that only have such a power draw? What are the best new Miners to buy that are available in Europe?

Edit: Added a question about status display https://bitcointalk.org/index.php?topic=5410345.msg60784841#msg60784841

Since the beginning of bitcoin it is basically in a very volatile uptrend. It is not likely that it stays like this forever (50+ years). What are your thoughts on what could be a price target for bitcoin longterm?

I made this calculation for an adoption of 50 % of the current world population:

21.000.000 Bitcoins : 4 Billion People= 0.00525 Bitcoin per person on average. The average value of the wealth per person globally is: 79.952 USD.

If you now would calculate the bitcoin price so that 0.00525 Bitcoins are worth 79.952 USD then you would end up with a bitcoin price of : 15.228.952 USD per Bitcoin.

This calculation is of course very inaccurate and makes a lot of assumptions. Still it can show where in some specific scenario the bitcoin price can end up, since for now I feel the price has just random targets and is dictated by exchanges and whales.

If you have different approaches feel free to share!

Is it possible to use a seed phrase for more than one currency? Specifically a bitcoin seed phrase for Ethereum? The way I intend to do that is by importing the seed words into an ethereum wallet and create addresses based on the Bitcoin seed words.
This may sound unnecessary to many, but will actually have the benefit that there is only one backup to be made and not many different backups.

After reading so many topics that discuss who satoshi could be and why he would leave bitcoin from one day to another it made me think: What is he doing these days? It is really unlikely that he never ever came back to the forum again, just to read and look at the progress. Also it seems likely that he had at least one alt account that may even be sill active.

First of all I want to address the general topic of account selling. There are two types of account selling, the "good" type aka transparent selling of accounts and the bad type aka secret selling of mostly stolen accounts. (example of transparent account selling)
Secret selling of bitcointalk accounts is problematic since it will use the trust that people give towards an established account to potential scam them or trick them into trusting them more than they should. Because not a lot of long time users are willing to give away their account for money it also encourages account sellers to steal accounts by hacking, phishing and other illegal methods.
To find potential buyers it happens from time to time that an account seller posts an offer in the marketplace section, without disclosing what accounts he has to offer. This makes the deal not transparent and therefore potentially dangerous to many users in the future.  
But these offers made me think: What if users would pretend to be interested in buying an account and therefore could uncover what accounts they are being offered by the accountseller. This way it would be easy to uncover what accounts are being sold!
So that is what I did and the result was rather overwhelming. I replied to an offer of user “Accountslegend” on Telegram.  He offered me the Accounts jkoil (Hero Member) and MatthewLM (Legendary) for the price of 500 USD and 1000 USD. Since during the talks the accounts came online on bitcointalk I was convinced that user “Accountslegend” would really the one who owns the email and password to that accounts. I was happy with the result for my first investigation.
After some time I thought: Maybe it would be possible to take this further and uncover more of the Accounts Mafia. So that’s what I did. I created a new telegram account and contacted him again. But this time I wanted more proof. I told him it was not enough that he could show me screenshots from the logged in account, but that I would need personal messages to my bitcointalk profile.
This is where things started to get interesting. Instantly I got a message from user “roslinpl” to confirm that the person I speak to on telegram is a Legendary member and that I could trust him. I got also a PM form the account that was offered to me this time “raffern” (Full Member). He offered me one more account "archive" (Full Member) and even offered me to buy his account “roslinpl” which I can only speculate would have been a scam and I would have never gotten the login data. To make things even better I got a PM form user “Monzsta” that asked me why I did not reply the day before to his offers from the other accounts. I also want to mention that even if I asked many times what user could act as an escrow I only got the answer that he prefers to do the deals directly with him.

So to summarize things up, with this simple investigation I was able to uncover the main actor behind most of the accounts for sale ads here: “roslinpl”. I was also able to uncover his two alt accounts “Monzsta” and “Accountslegend”.
Furthermore I was able to uncover four accounts that are being sold at the moment(MatthewLM, jkoil, raffern and archita), with one account that was already sold during the investigation (jkoil).

During the investigation I was also added to a Telegram chat group that it is run by “Accountslegend” aka “roslinpl”. In this group there are a lot more accountsellers like “roslinpl”. So this is where this thread comes to play: In the next post you will find a list, where I will add any account that a users can provide proof that the account was offered to him by an accountseller. Furthermore there will be one more list with known account sellers here on bitcointalk. This makes accountselling transparent and unattractive for scammers. I want to say again that the selling of account is not necessarily bad, but should be disclosed to the public.

Evidence: (Klick here for full size images: https://ibb.co/album/rb971s)

Since I want to do some testing with my hardware wallets, multisig and other stuff that generally interests me, I would need a larger amount of tBTC. I can understand that people will not just give away larger amounts of tBTC since if they would do it, they would quickly run out of them also. So I was thinking I could just point a miner at a testnet pool for a few hours/days to get the amount that I would need. After some research I found out this will be more difficult than I thought, since many pools seem to be offline. Also it is many times suggested to set up your own pool. Since I don't have the time to set up the pool and also not the mining power to solo mine, I would be happy about some tips how to obtain the needed tBTC.

Da ich keinen solchen Thread gefunden habe, dachte ich starte mal einen Schnäppchen Thread. Hier kann jeder Schnäppchen mit Bitcoin Bezug posten
Ich fange mal an:

Momentan gibt es die Kingston Industrial MicroSD Karte 8 GB für 10.29 € bei Amazon (https://www.amazon.de/dp/B09CYKGS6S?psc=1&ref_=cm_sw_r_ud_dp_SJP7QFPXAFY860T5Z2BX)

Hab mir selbst welche bestellt, denn die Karte eignet sich wegen der langen Haltbarkeit und der Robustheit besonders gut um Backups von Wallet files, Seedphrasen etc. zu speichern. Natürlich sollte man immer mindestens zwei Backups vornehmen.