Being one of the most recognized wallet doesn't mean it should be recommended. OP has already installed electrum which is open source and one of the most secure wallets and should avoid any close-source wallet like trustwallet.


Note that electrum isn't always used for cold storage. Electrum can be a hot wallet too. Being a cold wallet or a hot wallet depends on how you use electrum.

You are adding the two decimal numbers together incorrectly.

67890123456789012345 plus 35000000000000 doesn't equal 67890158460000000000. It equals 67890158456789012345. That's 3AE2A4B6B41E40F79 in hexadecimal format and has been calculated correctly by the tool you used on Linux.

No. This is wrong.
The transaction ID is calculated by hashing the transaction data through SHA256 function twice. So, with any change in the transaction data, you get a new transaction ID. For example, the new transaction can have a different fee or a different locktime and even with the same inputs and same outputs would have a different ID.

Electrum is secure enough. It's non-custodial and give you full control over your fund. It's also open-source and we can be sure that there's nothing hidden going on behind the scene.
Before sending any fund to your wallet, make sure that you have download electrum from its official website and verify your download. Also, keep you seed phrase offline in a secure place, so you can recover your wallet in the future.

You are right. But I still expect OP's transaction to be confirmed in the coming weekends. Of course as you truly said, not because the network is usually less congested in the weekends, but because all binance consolidation transaction will be probably confirmed in the next 2 or 3 days and the network state will be normal again.

The mempool is becoming less crowded and as mentioned by NeuroticFish, your transaction will be probably confirmed.
Two days ago, there were around 150 vMB of transactions in the mempool and now the mempool size has decreased to around 60 vMB.
It's very unlikely that your transaction remains unconfirmed and dropped from mempool of nodes.

This is wrong.
The amount of fee required to be paid for a transaction has nothing to do with the amount of bitcoin you send.
The transaction fee depends on number of inputs and outputs, your address(es) type, the network state and how fast you want your transaction to be confirmed.

It's impossible to say when your transaction will be confirmed, but I expect it to be confirmed in the weekends.

Right. You don't need internet connection for that.


Servers have no role in generating the seed phrase.
  

Whether you want to generate the seed phrase through GUI or console, you can do that offline and it's not that generating the seed phrase using commands is safer.

In both cases the seed phrase is generated completely randomly (assuming your dice is balanced and all the numbers have the same probability to be chosen) and is secure enough.
It may worth mentioning that, if you want 100% security, you should generate your seed phrase on an air-gapped device.

It's not that there's a centralized server keeping all addresses, private keys and seed phrases.
Your private keys are derived from your seed phrase through some mathematical calculations locally in your device and you sign the transaction using your private key without any need to being online.

I fully understood you.

There's a chance of that, but that's almost impossible.
If you know that any bitcoin address can be generated by 2^96 private keys on average, you may worry even more. But as I said in my previous post, a bitcoin private key provides enough security and there's nothing to worry about.

That's true only in theory. The probability of getting a 10 digit number is almost zero.


It's not recommended to use brain wallets. It's recommended to generate a random private key.


No. There is no risk. What you worry about can happen only in theory. A private key generated properly provides enough security.

There is no bitcoin mining website and all so called cloud mining websites are scam. Such websites usually display a fake number as your balance and once you reach their minimum withdrawal amount, they ask you to deposit some bitcoin to be able to make withdrawal.

Don't waste your time and your money. That's not how bitcoin is mined.

Number of valid private keys is slightly less than 2²⁵⁶


Not completely impossible. Almost impossible and very very unlikely.


Yes, that's possible if the wallet hasn't been coded properly and that's why you should use always an open-source wallet to know how the keys are generated.


That's between 1 and FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364140

Since scams are not moderated and some users may wrongly think that services with pinned topics are secure, I don't agree with the idea.


The forum doesn't need any money.
Theymos has even disabled advertising banners. See the following post.

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That's no longer possible.

Since we can only estimate the hash power of some mining pools and there are many unknown miners with unknown hash rate, it's impossible to answer to your question.
It's possible that a solo miner has found a block with a very low hash power, but we can't know how much hash rate is owned by any of individual miners.

Doesn't archive.org (and other archiving websites) archive a webpage only if someone requests that? As far as I know, they don't take snapshot regularly.
It's possible that a webpage has been archived more than 100 times while another webpage has been never archived.

I wonder where you got the 354 MB from. That's wrong.
Currently, there are around 150 MB of transactions waiting for confirmation in the mempool and even a transaction paying only 1 sat/vbyte should be able to enter the mempool of any node.

As mentioned by Abdussamad above, it's only the command that is recorded. The output isn't recorded.
You can simply open your wallet file using a text editor application and check what has been recorded. You will see your used commands under "qt-console-history" and you won't see the outputs.

Are you saying that you have made transaction from the same wallet without entering 2FA code before?
As I already said in my previous post, this is impossible. The wallet has been 2FA since the creation date.


That's normal.
If it was possible to export the seed phrase of a 2FA wallet, that would defeat the purpose of 2FA.