As far as I know, seed phrases generated by blockchain.info wallet from that list contains 16-20 words.
As OP's seed phrase includes 12 words, I don't think it can be generated by blockchain.info wallet.

Armory gives you 18 sets of meaningless four-letter words which is called root key.
Given that OP has a seed phrase including 12 words, it can't be generated by Armory.

Are you saying that Satoshi may have lied to us and bitcoin is centralized? If so, that's not possible.
Bitcoin is an open-source project and we all know how it is working.
Anyone can download the blockchain and keep a copy of it. Anyone is able to validate transactions. Anyone is able to make transaction without relying on any third party.

There is no doubt that Satoshi has mined bitcoin in the early days. But no one knows how many bitcoin has been mined by Satoshi.

To mine bitcoin, you must solve a mathematical problem which is called proof of work. That problem is solved through brute-force method and anyone (or a group of people) who finds the solution faster than others can claim the reward.

There is no proof that satoshi has that number of bitcoins. Any number you hear is only a guess.


No. Bitcoin private keys are secure enough.

A small correction:
Miners get the new generated coins (which is currently 6.25 BTC per block) and the fee paid for the transactions included in the block.

Transactions are recorded and stay in the blockchain forever.
If you don't see any transaction, it means that the wallet you opened has been never used.

With verifying the signature, you only make sure that you haven't downloaded a fake version of electrum. That doesn't mean you are 100% secure. There's still the chance that your computer is infected with a malware. 


Follow the guide provided by DireWolfM14.
[GUIDE] How to Safely Download and Verify Electrum [Guide]

You can import your seed phrase into your new laptop. In this way, you can have access to your bitcoin in both laptops.
If you worry about the security of your old laptop, you should create a new wallet in the new laptop and make a transaction and move all the fund to your new wallet. In this way, your bitcoin will be no longer accessible in the old laptop.  
Note that with having the same wallet in two computers, you double the risk of getting hacked, being robbed, etc.

To make sure of that, I just created a watch-only wallet and tested it with ismine command in console tab. As shown in the following image, that's possible.

Right. Even now, bitcoin core doesn't support seed phrase.


If all words exist in the old electrum word list, there's a big probability that the wallet has been generated by electrum.
Maybe, the wallet hasn't been funded at all and that's simply why you don't see any balance.

Not quite true.
Take a look at the topic created by ThomasV in November, 2011.
In that time, electrum was using a 12 word seed. That seed was created using a different algorithm from a word list containing 1626 words.

Take note that you don't have to make a request before receiving fund.
You can go to "Addresses" tab and pick any of addresses you see there. All of those addresses are yours and can be used for receiving bitcoin.

If you don't see "Addresses" tab, click on "View" at top of the window and select "Show addresses".

No.

One type of wallets people were using that time was paper wallet. It was a combination of an address an a private key written on a paper.
The other wallet I know people could use that time was bitcoin core.


If I'm not wrong, in the very old versions of electrum, there was a seed phrase which was created using a different algorithm and a different word list.

You can't access it.
The website is down for everyone.


It has been registered 43 days ago and it's probably a scam.



I haven't ever used this website, but there are so many negative reviews on trustpilot.

The website you are referring to is down now and I don't know what they are offering. But whatever they do, I wouldn't trust them. Their domain has been registered only 39 days ago.
 

Seems that there's a problem with the search engine too.
I get an error saying "Something went wrong..." when I try to search for posts or addresses.

The forum doesn't have such a feature. He will get a notification only if he has subscribed to one of notification bots.


Stake has a thread in the forum. (Click here.)
Post your issue there. You may get a better respond.

They should know that yolodice has been closed and you are not able to give then such them details. If they don't know that, tell them that Yolodice has been closed.

Have you ever made any deposit from an address you have full control over?
Have you ever made any withdrawal to an address you have full control over?
If so, tell them you can sign a message from that address. They may accept it as an evidence. (Before that make sure that you can sign message.)

Wallets can be categorized into centralized and decentralized as well.
When you use bitcoin core, you are using a decentralized wallet, because you don't rely on any third party.
When you use a wallet like trustwallet, you are connected to their server and you need to receive data from them. Also, you can't make any transaction inside trustwallet, if they don't want to broadcast your transaction for any reason. This is why trustwallet is centralized wallet.