This looks like Binance, their current Bitcoin withdrawal fee is flat 0.0005BTC (previously "dynamic", based on the price of Bitcoin)
During the 2017 bubble, Bitcoin price was excessively higher than it was months ago so if the withdrawal fee is "dynamic", it will be lower, so that must be the reason why you've seen 5000satoshi withdrawal fee.
(not sure if Binance set it that low though considering the mining fee at that time).

That also applies to other custodial wallets/exchange with dynamic withdrawal fee, not in "non-custodial" Bitcoin wallets.

But in Bitcoin, it's based from the network's condition and size of the transaction (in virtual bytes).
The average 'fee rate' (sat/vB) might increase if there are too many unconfirmed transactions competing in mempools;
the 'total fee' will increase based from the 'fee rate' and if the transaction itself is big in size mostly because of having too many inputs.

Aside from the above about using only trusted Exchanges,
make sure to read the Exchange's TOS, FAQs and other articles because most of them have a strict requirements when it comes with large deposits amounts.
you may be required to pass a stricter KYC after depositing even half of your Bitcoins; DYOR.

Congrats BTW, so your previous claim that you've bitcoins from 2011 is true and you've successfully bruteforced the password (link).

Maybe it's pertaining to this 'checkpoints' file:
https://github.com/spesmilo/electrum/blob/master/electrum/checkpoints.json - contains block hash and target;
Which are from: https://github.com/spesmilo/electrum/blob/b431d8e9b8f75b99a43540ed6672772abfb68834/electrum/constants.py#L63-L64

I've got the same error and behavior by changing some "block hash" from the client's 'checkpoints.json' and connect to a known working server.
But I guess in your case, it's Electrs server's blockchain at fault; perhaps it's using testnet blockchain rather than mainnet or have some minor corruption?

You may have copied the wrong wallet.dat.
Where did you copied the walllet.dat from; and where did you pasted the wallet.dat to the new laptop?

If you want to make sure, you can make a backup manually and open it in the new laptop (Don't do this if your blockchain is pruned).
In the old laptop, use "File->Backup wallet" while the wallet with 10BTC is open, then transfer the 'walletname.dat' to the new laptop's "wallets" folder of Bitcoin data directory.
Open it using the menu "File->Open wallet", wait for Bitcoin Core to scan for balances.

What "units" are those?
Please include details in your post so users could help you.

If it's a Bitcoin mining ASIC, then you can move this thread in Mining Support board: https://bitcointalk.org/index.php?board=40.0
If it's an Altcoin ASIC or GPU, move this to the Altcoin Mining board: https://bitcointalk.org/index.php?board=160.0
The "move topic" button is at the lower-left hand side of the page.

Alternatively, contact the manufacturer for technical support.

Isn't "listen=1" the default setting?
If so, not having "listen=0" or a blank config file is as good as adding listen=1 to the config/start parameter.

Yes, "Conbase Wallet" is non-custodial and "Coinbase" is custodial.
But OP's description of the withdrawal doesn't fit 'Coinbase Wallet' so I find it not necessary to mention here.

This has everything you need to know about wallet encryption: github.com/bitcoin/bitcoin/blob/6b8a5ab622e5c9386c872036646bf94da983b190/doc/README

If you need to do that, you can set a timeout of '1' second so your passphrase master key wont stay in your RAM for too long.

Unfortunately, custodial wallets that fall to that category are most likely scams.
Legit wallets have to comply with your Government's law so a level of verification is required depending on the country.

For Exchanges, their 'withdrawal fee' is ridiculous compared to wallets, you wouldn't want to use them as a wallet even though some of them allow crypto withdrawals for non-verified users.
They can also lock your funds if they found "something" in your transactions.

---

Despite the consensus in the replies, you still decided to go for custodial...
perhaps in terms of privacy, are you only concerned about your privacy against users, not the authorities?

The thing is, Bitcoin is decentralized, meaning, there's no central authority nor client that can implement the changes solely by itself.
The closest thing there is, is Bitcoin Core (the reference client).
Since majority of the nodes use Bitcoin core, any changes to its implementation of Bitcoin will most likely be implemented to Bitcoin unless the majority refused to update or switched to a different Bitcoin client.
I believe I've already sent you a link to Bitcoin Core's repository together with my response to your PM.

Bitcoin has some flaws but not specifically what you've described in the OP.
It's like you're saying: counting from 0000000000000000000000000000000000000000000000000000000000000001 to FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364140
is a "security flaw" because "all those private keys work", sadly it's not "infinity" like your private keys.

In terms of handling funds, Electrum and Blockchain.com are the same because both are non-custodial.
You'll be spending your "unspent transaction outputs" (UTXO) from your received transactions to create a new transaction.
So if you're receiving funds with a single address, all your withdrawals will use the UTXOs associated with that address in your wallet;
to mitigate that, you just have to use a different address every time you receive funds so "receiver A and B" will see that the txns came from different addresses.
You'll have more options in Electrum by utilizing "coin control" for better selection of UTXO.

Coinbase (Wallet/Exchange) is different, it' a "custodial service", withdrawals came from different addresses because those are Coinbase's "Hot Wallet" used for withdrawals.
Different addresses, yes, but in terms of privacy, authorities or whoever in contact with them can easily point your identity based from their database and/or blockchain analysis,
custodial services aren't really that private with their hot wallets, even a regular user can tell that it's from Coinbase by using walletexplorer.com.

Like I have mentioned, the feature is available and standard to the Bitcoin network, it's called "rbf" (replace-by-fee) that can be utilized for double-spending those unconfirmed wrongly sent transactions.
The issue is if the client/wallet supports that "feature", that's why I've suggested you to use Electrum because if that's your client, you could've cancelled that transaction since you've already noticed that it's a scam right after clicking 'send'.

If you want your wallet to have a similar feature, you can open a "feature request" in their repository page if it's open source, contact their support if it's a closed-source wallet.
Explain that you want them to implement something similar to Electrum's "cancel (double-spend)" feature.

It's been almost a month since you found a "security flaw" in Bitcoin (BITCOIN SECURITY).
Please let us know if you already found any balance from the "infinite private keys" that you've found.

You said you're looking for a way to track them and involve law enforcement, right.
Then I'd suggest you to keep your communication with the suspect by stalling with few of more of those "questions" and show it to the authorities.
Police may be able to get some leads if they are knowledgeable in crypto and if the scammer is dumb enough.

Yes it is phishing, blockchain.com's email should be from @blockchain.com or @<subdomain>.blockchain.com - with dot before the url.
(and the replies should be weeks to months apart :D)

If you'll ever hodl Bitcoin again, I'd suggest you to use Electrum (electrum.org | verify signature).
Because it has a convenient "Cancel (double-spend)" button that perfectly "solves" that statement.
With Electrum's default setting with enabled "Use RBF", you can basically cancel a mistakenly sent transaction by automatically creating a double-spend transaction with your own address as the output, that's as long as it doesn't have a confirmation yet.

BTW, I saw your other post about the details of the scam, and it's the most obvious type of scams out there.
I'd say you need to research more about all sorts of scams before going back to "investing" again.

"Blockchain info"? You're not talking about the online wallet with the same name, right?

For the blockchain and other data, just copy the entire data directory to your other computer (same directory) and it should run fully synced.
The default data directory is in: https://en.bitcoin.it/wiki/Data_directory#Default_Location
Exclude the "wallets" folder if you do not want to copy the wallets.

That's too early for custodial services, according to some articles, even the earliest Exchanges just emerged in 2010.

By saying "free bitcoins", perhaps you meant a "faucet"?
Like this old faucet?: freebitcoins.appspot.com

This old post may be the one you're looking for and I believe it's the process used by most vanity address generator including Vanitygen for split-key generation: Re: custom bitcoin address wanted.

I hadn't noticed it but I think you also need to edit another part of PawGo's code to work with Electrum:

From:
Into:

https://github.com/spesmilo/electrum/blob/master/electrum/mnemonic.py#L164

You'll probably get better replies from this board: Bitcoin > Mining > Mining support

Try to move this using the "move topic" button at the lower-left side of the page,
I'll also ask a Mod to move this thread to that board in case you're not allowed to move it.