Thank you @ranochigo for the information. So, this rule overrides the RBF third rule mentioned in bip125
This means you can't make CPFP if the parent transaction has more than 25 ancestor, right!

Regarding my question to @o_e_l_e_o, I did a quick research about "transaction pinning" and find out he was right:

The facebook post is redirecting to a Google form which also asks you to enter a trust wallet seed. Both the website and the fb page are most likely controlled by the same person but I couldn't find any direct and clear link between them. So good catch op!
The funny thing is that the facebook page was created in 2015, two years before even trust wallet was founded. It also has more than 20k followers so it's definitely a bought page.
I reported it and hope it will be taken down soon.

It's also important to note that if the original transaction has more than 99 child transactions, it can't be replaced no matter how much fee the replacement transaction pays.

Are you sure the fees paid by child transactions have to be included too? Because, the way I interpreted it, by "original transactions" I believe they mean only the transactions which ,at least, one of their inputs is going to be consumed by the replacement transaction! (=> a replacement transaction can cancel/replace multiple transactions by consuming inputs from each one of them).

If you have created a backup of your wallet file and saved it on your USB key, then you should look for any file without extension (wallet_name) or with .backup extension (wallet-name.backup) if you were using a recent version of Electrum.
If you exported your wallet's private keys to your USB key, then you should look for a .CSV (by default) or a .JSON file. The file name is electrum-private-keys by default.
You can also search for the file by its creation date and/or its size. You said you created your wallet on September of last year so you can safely exclude any file which was created before that.

Yes it exists and it's already listed on CoinMarketCap
Not sure how legit the Serum project is but here is the official link to their website: https://projectserum.com/
The funny thing is that they are not conducting any token sale right now. Do these scammers really think someone will invest his money in a project without even googling its name!

I didn't use Neteller for a long time but I remember it was possible to deposit bitcoin which will be converted to your account's currency.
IIRC, you have to choose deposit and select the bitcoin depisit option. After you enter the amount you want to deposit, a bitpay invoice will be created with the equivalent amount in bitcoin you have to send.
If this doesn't work anymore then your best option is to find a trader on any p2p exchange willing to accept bitcoin for Neteller.

I don't think this is tbe case either. Because according to their help page only bank deposits and crypto purchased with those deposits are subject to the "funds on hold" policy and you would get a notification on when you can withdraw them.
Also, not a coinbase user, but if it was an accout verification problem, aren't they supposed to send you an email asking you to verify your account!

Is your wallet connected to your Coinbase account? If it is, then this looks like a serious vulnerability!

Electrum old versions used to let the user choose between priority and privacy coin selection. When you select priority, Electrum will use the oldest utxos as inputs. Not sure why this feature was removed!
Although the current algorithm might be good for users privacy as it ensures an address can't be reused, it surely will make them lose a lot of money on fees.

I have/will never encourage anyone to use centralized exchanges or any other service that will keep your funds in their custody (unless there is no other alternatives).
I thought OP was asking about CEX policies regarding this matter, hence my reply.

Then, they will lock your account and seize your funds and you can't do anything about it unfortunately.

The reason why such blatant scams still exist and people still fall for it more than other scam tactics where you have to send money or download money is that the victims do not realize how valuable their personal information are.
When they receive an email like this, they would say: "Ok, it's most likely a scam but I want lose any thing if I send them my personal info!"
They simply don't know that these data can be sold in the dw and can be used in identity fraud crimes. It can also be used in many other malicious activities such as extortion, social engineering...

I doubt a regular user can find out if his coins were mixed just by tracking the address history on a block explorer. Even the biggest crypto exchanges wich have a lot of resources cooperate with blockchain analysis companies like Chainalysis to help them with this.
Anyway, I don't think this is something to worry about if you can prove you bought the coins after it was mixed when the exchange asks you about the source of your funds.

All markets can be affected by news and rumors. But since the cryptocurrency market is relatively new and small the impact of positive/negative news is bigger and more noticeable.
Influencers like Elon Musk are trying to take advantage of it to manipulate the market for their own benefit. But likely, the community is gaining immunity against it and are paying less attention to their manipulative tweets.

This reminds me of Livecoin exchange. They claimed they were hacked and shut down their service. Later, they announced they will refund customers who will verify their identities. But to my knowledge, not a single user (with enough credibility) has confirmed receiving anything from them.

It looks more like an attempt to avoid being sued or legalize the stolen coins than a genuine intention to refund their customers.

I just claimed the $1 bonus and used it to test out your casino and play few games.
Sorry for being blunt but the design and colors need some improvements. Also, whenever I click on the help (?) button on any game I get a blurred page and I have to reload the page to get rid of it.

I read about how your provably fair system works and what got my attention is this part:
You should not provide the server seed but you must provide its hash. Where can we find the hash of the server seed and how can we get the server seed if we want to verify the results?

If you are using a reliable wallet and you are 100% certain the recipient address, amount to be sent and transaction fee are correct, then there is no real need to make a test transaction.
The only risk is if the receiver (for some reason) gives you a wrong address.

Being able to withdraw bitcoin to your own wallet or to any third party wallet is the norm not the exception. In fact, this feature had to be implemented since the beginning. Buying bitcoin on their platform and not being able to withdraw it didn't make any sense, imo.
Not sure when it will be implemented but certainly it will have a positive impact on the market since it's going to be the fastest and the easiest way to buy bitcoin (assuming they will charge reasonable fees).

You have to send them the amount you want to double spend plus their fee (4.9%) which is rediculous since you can do it for free with any wallet that supports rbf.
Although they give you the private key for the address you have to fund, it's still risky as they can sweep it anytime they want.
Even if they are not going to scam, there is always a possibility to lose your money if the receiver spends the unconfirmed transaction and his cpfp transaction gets confirmed before the rbf transaction.

In any case, don't use this service!

It's the same coin. If you check their announcement thread you'll see that it was posted in 2017.

In fact, the pump happened because of the false claims that DBIX got approved by the government of Dubai and became their official cryptocurreny. Dubai media office and Arabianchain refuted these claims.
Most likely this is why DBIX got removed from CMC and coingeko.
https://www.livemint.com/market/cryptocurrency/dubaicoin-cryptocurrency-jumps-1000-in-24-hours-after-false-claims-11622198344269.html

Each trader has his own preferences so what might be a good exchange for you, might be a bad one for another trader.
Create accounts on different exchanges and decide for yourself which one is the best suited for you. Just make sure it's a reputable/well known exchange.
Having accounts on different exchanges is also a good thing if you are interested in arbitrage trading.

حسب المقال المضمن في المشاركة الاولى، كل العملات الرقمية معنية و ليس البيتكوين فقط. المعدنين اصحاب مزارع التعدين ليسو المستهدفين الوحيدين بل الشركات التي تزودهم بالكهرباء كذلك و حتى محلات الانترنات العمومية تلذين يستعملون اجهزتهم للتعدين!

لكن حسب ما فهمت هو لا يزال مجرد مقترح و لم يتم النظر فيه بشكل رسمي و تفعيله.
الحل الامثل حسب رايي هو الانتقال لاستعمال مصادر طاقة متجددة خاصة ان السبب الرئيسي وراء هذه الهجمة على المعدنين هو الاستهلاك المفرط للكهرباء و التاثير السلبي لذلك على البيئة.