A partially off-topic question here about Schnorr signatures since you mentioned multisignature keys. If you and I shared a multisig address before Schnorr signatures were officially implemented, could its features (signature aggregation, transaction size reductions) be used with our old multisignature address? Or would we have to create a new one after the BIP gets adopted?   

@rosenbauer02
Good. We have now established that Anna bought the wrong coin. Instead of bitcoin, she purchased bitcoin cash. However, the coins are no longer on the exchange. She withdrew them to her personal wallet.

Is there something that she can do with the wallet/wallets to gain custody of the purchased coins, and what is it?

Well, which one is it? You started off good, but than you got off track. Look at the screenshot. Which coin did the site highlight and what did she buy?
Where are the coins, and how does she gain possession of them? Remember, her bitcoin wallet shows no balance. What does Anna need to do?

@badger27
S vremenom kada postaneš iskusniji i više vremena budeš provodio na forumu, primjetit ćeš da su meriti mnogo bitni prilikom ulaska u dobro plaćene kampanje. Ali nije bitno samo da ih imaš mnogo, nego da ih i dobijaš redovno.

Mnog kampanje sad kod prijava traže da napišeš broj primljenih merita u zadnjih 120 dana. To znači da nema opuštanja. I ako stekneš najveći rang, to ti ne garantuje da ćeš biti primljen kada se otvori pozicija u kampanji na koju ciljaš. Jer možda si se u tih zadnjih 120 dana opustio.

Zato menadžeri i traže da imaju uvid u tu statistiku. Da ne bude kao kad se naši ljudi uvale u državnu upravu i onda prst u uhu, baš me briga, sad ću lagano odmarati do penzije.

Ako dobiješ 3-4 merita u zadnjih 120 dana, a novi klinci dolaze koji imaju po 200-300 (što nije neobično ovdje na forumu), izgubit ćeš od njih, bez obzira na tvoj rang.   

I read about Schnorr signatures a few months ago. If I remember correctly, signature aggregation is just one important feature. The privacy improvements will make it impossible for others to know that you are using a multisignature address. Since the signatures are merged into one, it's also not going to be possible to see what kind of multisig is being used, or who signed the transaction.

It was an applaudable sporting gesture by Mourinho, but it's also not the first time he has given his opponents credit for defeating the teams he coached. He praises underdogs occasionally. He will of course not do it to a rival team or manager.

I watched an interview with ex Dinamo Zagreb General Manager Zdravko Mamic last night. In this interview, he mentioned Jose's act and said he was pleased to hear Mourninho say that his Tottenham side was beaten by a Dinamo Zagreb "family". He was referring to the team spirit and sacrifice they showed on the pitch.     

Does anyone remember what that support article looked like before? I checked web achieves and found a snapshot from August 2020. According to the snapshot, they used the correct names back in August as well.

It says:

Because of that demand and increased interest from investors, it's the perfect opportunity for people like those operating bitcoin.com to try and trick more people into buying the wrong coin. Don't you think?

Nema ništa loše u prijedlogu i u tome da imamo zasebnu sekciju za teme koje se tiču rudarenja. Možda vrijeme kad to tražimo nije najbolje. Prethodni mjesec, a vjerovatno i ovaj, nisu baš najbolji kada se gleda aktivnost članova na našem lokalnom forumu. Nismo dugo tako malo pisali.

Admini bi mogli to vidjeti kao šta sad ovi hoće opet? Dodali smo im nove podforume, a njima je aktivnost u lokalu u zadnjih 40 dana pala kao tokom 2019te godine.
Koliko je u posljednje vrijeme bilo tih mining tema koje bi se mogle prebaciti u zaseban podforum? Imal ih bar 10ak?

No, it's not. Both these experiments prove that it's all down to luck. Yes, you can lose your money, but you can do that with any other bet using a specific strategy or just betting randomly. Having said that, I don't think Martingale is a good strategy. It's certainly not bulletproof otherwise it would have been made illegal by the bookies.   

A change, misuse, or hack of the protocol (call it whatever you want) has already happened in 2010. That later became known as the overflow bug. One user noticed a bug in Bitcoin's codebase and used that opportunity to generate 184 billion bitcoin. But because the network didn't work as it was initially configured to do, this was quickly fixed by satoshi and the bitcoin developers because those generated bitcoins didn't follow a previously laid out emission plan.

You can read more about the overflow bug here:
https://bitcointalk.org/index.php?topic=822.0
https://bitcointalk.org/index.php?topic=823.0

While I was writing another post, I visited bitcoin.com and noticed a change on their website. When you click on the Buy Bitcoin button now, the site doesn't try to trick the users into purchasing Bitcoin Cash instead of Bitcoin. It automatically selects Bitcoin as the asset you are trying to purchase. If you want Bitcoin Cash, you have to manually find it on the list.



They also changed the names of the coins. In the past, Bitcoin was referred to as Bitcoin Core, and Bitcoin Cash was either just Bitcoin or Bitcoin Cash.   
What caused this change of heart? I doubt it's the good nature of the site owner?

Riddle #2

The year is 2018. Anna works in the most prominent law office in town, and she just received her yearly bonus of $2.000 from her boss. During the lunch break, some of her colleagues talk about investing their bonuses in Bitcoin. She remembers watching news reports about Bitcoin and crypto on several occasions throughout the last couple of months. She decides to give it a try.

She has no experience with cryptocurrencies and thinks, how hard can it be? She powers on her computer and visits the only crypto website she has ever heard of, Bitcoin.com. Between the options Bitcoin Cash and Bitcoin Core, she clicks on the Cash version. She wants to buy digital coins, so that’s cash. What is she going to do with Core anyway, and is that even a thing?


Image source: A thread on Bitcointalk that I won't link to, to not give away the answer.

She purchases the coins with her credit card. She withdraws them to a legacy address on her non-custodial bitcoin wallet. After a few days, she opens up her wallet to check the value of her coins. But the wallet is empty.

-   She sent the coins to the correct bitcoin address.
-   She used a genuine wallet.
-   The wallet has synced with the blockchain, and there are no other problems with it.


Why is her wallet empty? What did she do wrong, and how can she correct the situation?

@Mr.right85
I don't know if that Coinremitter signature you are wearing is because of an advertising campaign or not. But if it was, I could easily track your addresses and see what you are paid, and where and how you send those funds. You can do the same with me or any other member of the forum. Considering, of course, that both our campaigns have public spreadsheets, and in 99% of cases, they do.

From a privacy standpoint it's not the best approach, but if the forum and the campaigns advertised on it are to remain completely transparent, it's needed. Thankfully, we have services like ChipMixer, CoinJoin, or privacy coins like Monero which can all be used to cover your traces.   

My initial plan was to conduct the experiment by increasing the stake 2 times after every loss. But doing a third one just to increase the wager a bit more doesn't seem that useful. I am planning to do some other things soon, but if I can think of another strategy or someone suggests one that I find appealing, I will surely do another experiment.

Prije par dana predstavljena je platforma https://albetrage.com/.
Evo i njihove ANN teme:
https://bitcointalk.org/index.php?topic=5323703.0

Arbitražno klađenje nudi mogućnost da se opkladama pokriju svi mogući ishodi jednog meča i ostvari dobit bez obzira na rezultat. Ova stranica mi za sad ne djeluje zanimljivo, ali vrijedi baciti pogled s vremena na vrijeme. Možda i ostave pozitivan dojam na forum.

That's correct. Tom was in a hurry and downloaded the first result that Google displayed. The first displayed result in Chrome is often a Google ad, and often these types of ads have been used to direct users to fake phishing sites and malware infected wallets. If Tom has acted smarter and done some research, he would have realized that electrum.org . uk is a phishing site. The only official site of Electrum is https://electrum.org/#home and there is even a warning at the top of the page that informs users not to download the wallet from any other sites.

The software he downloaded from the fake site was malware-infected. It was designed to empty the wallets of its users and send the transactions back to the hackers. Tom also didn't follow the recommendations on Electrum.org to verify the signatures of the wallet he downloaded. Had he done that, he would have realized that he was using a fake app.

The thread is now open for all ranks. I will post a new riddle soon...

Let us start with an easy one…

Riddle #1

Tom watches a YouTube video about bitcoin. The video shows interviews with people who have made incredible profits in the last two years alone. After he watches the interview, Tom decides that he will purchase bitcoins.

He registers at a local exchange and buys bitcoin with his credit card. He remembers the YouTube video that he watched where several users recommended using Electrum for storing their coins. He decides that’s going to be his wallet of choice as well.

He opens up his Google Chrome browser and types “electrum” in the search field without researching further. The first result seems promising and looks like an ad of some sorts. It points him to Electrum’s website, as shown below:



He downloads Electrum after just a few clicks, installs the software, and is ready to initiate his first bitcoin transaction.

It’s already late, and he has to go to work in the morning. But before he goes to bed, he withdraws his coins from the exchange and sends them to his new Electrum wallet. When he wakes up in the morning and checks his phone for any new messages, he notices an email from his exchange that confirms that his withdrawal was successful.

Excited, he turns on his computer and opens the Electrum client. To his surprise, the wallet balance is 0! His wallet history shows two transactions: one incoming transaction from his exchange half an hour after requesting the withdrawal and one outgoing transaction from Electrum to an unknown address.

Tom knows that bitcoin is irreversible and that he can’t recover his coins. Disappointed with the outcome and for losing $300, Tom heads off to work. He can’t understand what he did wrong, so he decides never to buy bitcoin again.   

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What happened here, and how did Tom lose his bitcoin?
What did he do wrong, and how should he have acted?   

I am trying to come up with some entertaining ways to engage newbies in learning some basics about bitcoin, crypto, and online security.

I came up with the idea of creating stories and riddles about ways in which people can lose their coins or have them stolen. I hope our youngest forum members will find them interesting to read and discuss what went wrong. Hopefully, that will teach them how to properly secure their assets and not repeat the same mistakes as the unlucky individuals in these made-up stories.

If there is enough interest in the topic, I will add new stories regularly and handout rewards in the form of merits to the quickest and most-complete answers. 



Local Rules:

•   This thread is intended for users of Newbie, Jr. Member, and Member rank.
•   Everyone else can freely comment, give suggestions, or propose corrections. Still, I would like to ask you not to answer the questions and give our beginners a chance to participate.
•   If you have suggestions on what kind of riddles and stories I should post next, please PM me.
•   To prevent the possibility of abuse, I WILL NOT merit a newbie whose registration date is after a riddle was posted. Your account has to be older than the date of the problem you are solving.
•   Pay attention to the stories, check the pictures, and links to solve the riddles.

This thread will have two statuses: 
 
•   Open for all ranks
•   Open only to Newbie – Member ranks

When I post a new story, the thread will be in status: Open only to Newbie – Member ranks. It means that only users ranked newbie, jr. member, and member can post. When the thread is in this mode, this picture will be visible in the OP:



If nobody manages to solve the problem after a couple of days, I will change the status to: Open for all ranks. In this status, members of all ranks can take part in solving the problem. When the thread is in this mode, this picture will be visible in the OP:

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Riddle #1
Riddle #2
Riddle #3
Riddle #4
Riddle #5
Riddle #6
Riddle #7
Riddle #8
Riddle #9
Riddle #10

I have read it a few times but I can't classify this as a racist remark. If the picture didn't show a black man and instead showed a white guy, would you have made this thread? Someone even commented in the thread you linked to that Cryptotourist (the person who wrote the comment) is black himself. Whether or not he is, I don't know.

This is the Belgian Minister of Heath:



She is a doctor, but to me that is not the face and body I have in my mind when I think of health, fitness, or nutrition. Whether she is white, black, male, or female does not affect my opinion on that matter. Google Maggie De Block if you want to see more of her pictures. Maybe she is a terrific physician and looks the way she does due to health problems, but my first impression wouldn't be this is a doctor and health enthusiast. 

@FortuneJack
Wasn't the deadline for submitting your fantasy team before the first matches of the 1/8 finals started? I thought the first leg was round 1 of the 1/8 finals, and the return legs are considered round 2. But looking at Juggy777 post, it sounds like you can submit your team each week, not once per round.

The matches played on 9-10 March are part of the same round (return leg of the 1/8 finals) as the matches played on 16-17 March. The matchday just lasted 2 weeks. @FortuneJack am I right or wrong?