It looks to me like this member replyd on your topic, then deleted his own reply (you can delete your own posts in most subforums)... I can be wrong about this, but that's how it looks to me.

OP, it looks to me like you have a lot of questions, and doubts about how everything works... And that's completely fine .
I'd rather see somebody asking questions instead of just trying something out and then having to ask for help to recover his/her funds.

Since you seem to be unsure about everything, my advice for you would be to start experimenting on the testnet... A tBTC has no value whatsoever, but most bigger wallets are also available on the testnet chain.

For core => create a bitcoin.conf file in the bitcoin data folder, and enter following string (without quotes) "testnet=1"
For electrum => create a shortcut to your electrum binary, adding the --testnet parameter
For paper wallets => https://bitaddress.org/?testnet=true

To get some tBTC => just google for "bitcoin testnet faucets", there are at least 3 working faucets

This way, you can easily create paper wallets, fund them, play around with core's wallet.dat encryption, sweep, import,... Worst case scenario you lose a couple tBTC, setting you back $0 (in fiat)

There are only less than 1675 addresses that have a 4 figure value of their sum of unspent outputs:

https://bitinfocharts.com/top-100-richest-bitcoin-addresses.html

Like it has been said before: if you know which 2 letters are missing, it's really easy to brute force. I can write a python program to do this, but i'd like to see you escrow that 1 BTC bounty first... cause, no offence, but claims of a 9 year old wallet from a new user that is claimed to have 1000+ BTC sound a bit shady to me...

which ip address would they check? The ip address of the node that broadcasted the transaction to them? There is a really big chance that this node wasn't the node that created the transaction in the first place, but just a node that was connected to a node that initially received the transaction from the transaction creator (altough that first node also didn't know it received the transaction from the transaction creator, there is just no way to know this for sure)..

Offcourse, if you use online wallets, ip logs can be checked... But you were talking about anonymous wallet...

Also, if you really, really want, core and electrum do support tor, and a VPN can always be used if you want to.

this strikes me as very, very odd...
Unless i'm missing something, member 1129919 is user invest4all
https://bitcointalk.org/index.php?action=profile;u=1129919

this user is just a normal member, he has only been around since august 2017, he doesn't have any mod powers as far as i know off..

How did you come to the conclusion that this member has deleted your topic? I really don't think he has the necessary privileges to do so...

Unless you mean that he deleted one of your posts you made in a self-moderated thread started by him... In this case, you'll have to PM this member directly...

mining bitcoin with a GPU has been death for years:
https://www.mocacinno.com/nonspecialisedmininghardware.php

even if you only pay 5c/Kwu for your power, and you have a very good GPU you'll make about 50 dolarcents a year, while burning more than 120 dollar in power...

Some altcoins can be mined with your GPU, but like i said in my first post: you should open a thread in the altcoin mining subforum to get more information about this

you don't have to use all unspent outputs... One address can be funded with hundreds of transactions, meaning the private key belonging to that address has to be used to create signatures for transaction spending any combination of those unspent outputs.
You don't have to create one big transaction spending all those unspent outputs at once...
So, it does not matter to the transaction size if you use one unspent output to address A or an unspent output to address B to fund address C.. It does matter how many unspent outputs you use....


Electrum uses a gap limit... It automatically derives more addresses... It always uses the next unused address, it has a different derivation path for change addresses. So, no, when using electrum as a standard user, the change addresses will not be reused..

That would be allmost correct, the rescan is either True or False not "rescan", just open the debug window, and enter this command... The label and the rescan are optional... You don't really need to enter those.
Where do you get the private key? Well, that was what the other posters and myself were telling you: you can use python (there is also a way to generate a script to derive keys from an xprv that can be written in python), or you use python to create a single private key (non hd), or you use bitaddress,...
Or you take the easy route and just use electrum for everything, in that case you don't need to worry about creating private keys and importing them...


No, if you swap your new (empty) wallet.dat with the old one, the encryption is still there.

As for the last question i found in your post: what does the HD mean: it means your new wallet is deterministic. It is deriving pk's=>public keys=>addrsses from an xprv, so you only need to backup your new wallet once.. .The non-deterministic wallets generate a random key each time you use a new address, so you need to backup this wallet at least every 100 actions you make.

Like i said in my previous post, localbitcoins isn't 100% safe either:


- localbitcoins might log your ip
- if you verified your account in some way, they have that information
- law enforcement might be setting up a sting
- there is GPS data from both you and the other party
- there might be camera surveilance at the place where you do the transaction

Sound paranoid? I'll leave you with this coindesk article, it was the first one that popped up when googling for "localbitcoins sting"
https://www.coindesk.com/localbitcoins-user-pleads-guilty-undercover-sting/

No problem, quoted that for you

I have to agree that reviews and feedback can be bought... However, i think it's pretty hard to buy/cheat/fake the complete picture while leaving no evidence for law enforcement. I mean:
a) if you have positive reviews on several different review sites

b) combined with an official label (for example: in my country a webshop can apply for an "official" label they can hotlink from a official site, if a webshop has this label, and it's hotlinked correctly you are sure that the identity of the owner is verified)

c) combined with whois records that are filled with real, verifiable data

d) combined with an ssl certificate filled with real, verifiable data

e) combined with real VAT and contact info published on your site

f) combined with an office location that actually points to a real office registered to the company you're buying from

g) combined with linkbacks from trustable sources

h) combined with the absense of scam reports linked to your site

I think that if you're able to check all (or allmost all) of these points, the chances of being scammed are pretty small...
But that's just my opinion.

I do fail to understand what you're trying to say with this sentence: "the coins need real apps to keep the price, but not only a symbol/number for exchange!". Bitcoin existed before exchanges existed. There are real apps around, but i fail to see how an app can keep the price (unless you just mean price tickers, but i fail to see where they would fit in the picture... I mean, they also exist for a long time, but it's not like they help people that are about to be scammed)

here you go

 
simple answer: you can't... You're in the bitcoin mining subforum, so the bitcoin mining long answer is: you need a very sharp electricity rate, and invest at least enough to buy a latest gen antminer S9 to have a chance at making a profit.
There are a couple of companies that are about to release an ASIC that's even more efficient than the S9 in the near future, but it probably won't be cheaper than the S9 (didn't check their pricing myself tough)...

So basically, you need a budget that's sufficient for:
- an S9
- a PSU
- shipping and handling
- import taxes
- networking
- wiring
- shelves
- cooling

Combine this with a <10c/Kwu power rate, and you have a good shot at making some money (if you play your cards right, and you are lucky)

To answer your question about what mining is exactly: this forum has a really nice search function... If you use it correctly, you end up at this page that will give you 100's of threads answering your question

IF you have a desktop PC with a good GPU, or even a decent CPU and a low electricity rate, you can try to mine some altcoins and exchange them for BTC... If you wat more info about this, i suggest you close this thread and open a thread in the altcoin mining subforum. Don't expect miracles tough, bitcoin mining is no longer something that can be done with a spare PC out of your basement... Same goes for the more stable altcoins...

You'll have to create your own script to calculate the profitability for all coins... The link i gave you was just a starting point that can be used to create your own scripts

If you use that formula, change the parameters (like diff and block reward) you can get the formula for other coins, multiply by the number of hashes per second and use an api from one of the bigger exchanges to get the BTC/altcoin exchange rate (maybe even use BTC/USD and show the prices in FIAT). It's not rocket science, but it does require a couple of hours to really dig into it and figure everything out.

For the second part of your question: i know miningrigrentals only releases funds to the rig owner 12 hours after the renting has been finished. Since they route all requests trough their proxy, they have a pretty good idear of what happened during the renting period. In case a renter is unhappy with the rent, they have 12 hours to lodge a complaint.
Offcourse, complaint handling is always a manual process, i don't think you'll be able to programatically find a way to listen to both parties and release or refund the rent without any human interaction...

True, and in fact, this is what happens regularly... People buy stuff from a fake store and lose their BTC...
If you're spending BTC, you should do some carefull review of the store, read feedbacks, see if they have a label, check out their SSL certificate, check out their whois records, check out their business VAT numbers, check out their offices on google maps,...

You can have a look at how your competitors solved these problems: nicehash and miningrigrentals are doing this for years.

For your first question, the answer can be found in this post: https://bitcointalk.org/index.php?topic=726962.msg8221939#msg8221939
Your second question: i don't have a clue as to what you are asking.. Sorry.. Which conflicts???

the "step by step" version is really, really easy:

1) download the standalone version of electrum
2) disconnect your internet, start electrum, create a new wallet, write down the seed words, generate a new deposit address
3) close electrum, remove the wallet file, try to restore the wallet from seed, check if the first generated deposit address matches the one in step 2)
4) delete the wallet again, reboot, reconnect to the internet, fund the address generated in step 2 (and 3, since that's the same address)
5) make safe copies of your words, don't let the touch a computer, laminate the paper, only store it in a very safe spot, or maybe even use something like https://en.wikipedia.org/wiki/Shamir%27s_Secret_Sharing (only run such a tool on an offline pc if you want to enter your seed, and always double check if you can restore the seed before burning your original copy!!!)

The thing is: you'll have to move your funds from bitcoin-qt to (in this case) electrum. bitcoin-qt doesn't use a mnemonic at this point (afaik).

There are other ways to achieve the same thing, like using python to convert a random seed to an xprv, then use a fixed derivation path to derive private keys from this xprv, then use the private key to generate a public key, and the public key to generate an address... Or there are downloadable tools like https://github.com/iancoleman/bip39... But i think electrum is the most user friendly way to achieve your goal

1) yes, some mixers don't charge a mixing fee, however, they're businesses so they have to make money (wich means that even 0% fee mixers will have a way to make you pay a small amount of money), and you'll always have to pay for the miner's fee of the transaction depositing the funds, and probably also for the transaction from the mixer's wallet to yours (i don't think the mixer will ever pay your transaction fee)

2) you can use a VPN if you want, but "hiding or showing a wrong bitcoin adress" is not really to the point. If you use an spv wallet, you have to send a request for fetching the unspent outputs for your address, there is no way around it... If you run a full client, you download the blockchain and broadcast signed transactions, but you don't usually send out your address...
There are no ip's recorded in the blockchain, and your peers can, theoretically, save the ip of the node sending them a block or a transaction, but they will never know if that ip is the creator of the block/transaction, or merely somebody that is just broadcasting a block/transaction they received from an other node... So there is little use in saving ip's unless you have a whole network of nodes and you can start running statistics on all of your nodes.

Hmmm... I'm sorry to say, but a 32 character private key starting with a 9 doesn't sound like a commonly used format to me (i can be mistaking tough)... This doesn't mean that it's impossible that this is a private key, but AFAIK it's not a commonly used format, so "standard" wallets like bitcoin core, electrum, the (depreciated) multibit (HD), armory,... will probably not support importing it it.

I guess your best chance will be to try to install the wallet you had on your phone before (the one you used to backup/export/save/... the private key) and see if you can use that private key to restore your wallet on your phone.

Please, edit your post and remove everything but the first letter (you really, really, really don't want a big part of your private key floating around online), and please add the number of characters of your supposed private key, it'll help us to make an educated guess as to which information you might hold