Like i said in my previous post: if you tell us the first character of the presumed private key, and the number of characters, we can see if it's a private key in a different form (a private key can be shown in many different ways, and not every form can be imported into every client)

EDIT:
Alternatively, you can download the sourcecode of https://www.bitaddress.org and run it on an offline machine, then try your private key in the "wallet details"-tab. This tool does not support all formats, for example the Mini private key format isn't supported (AFAIK)

An alternative (faster) option would be to download electrum standalone, then create a new wallet, recovering from private key instead of seed. That way, the OP wouldn't have to download the complete blockchain, and a rescan isn't needed when issueing an importprivkey cmd

OP: never reveil your public key, however, it might be interesting for us if you'd tell us the first character of the private key AND the number of characters in your private key (nothing more, nothing less)

If they actually did this, it would be the exact oposite of net neutrality:

https://www.savetheinternet.com/net-neutrality-what-you-need-know-now


So IF the isp was actually traffic shaping or blocking, it would certainly not be "enforcing net neutrality".

But, it looks like the OP just maxed out his monthly cap, so it has not much to do with net neutrality in the end.

You can re-use those addresses to, but like AdolfinWolf already said: you're compromising your anonimity... If you're fine with that AND you're using a recent wallet, there should be no problem with address re-use. In the past, there were problems with signatures re-using the same R value, in which case multiple signatures could be used to calculate your private key, but in recent times, i don't think there are wallets that still have this problem.

The main question remains: why would you re-use a address generated by a HD wallet? Personally, i do re-use my vanity address, but addresses generated by a HD wallet are single-use only.

I don't think there is a "change" field in the "sent" tab. I think you have to go to your preferences and make sure the field "use change address" in the "transactions" tab is unchecked...

However, i'm still not sure why you would do such a thing...

jmigdlc99 is correct, i only wanted to add one thing: the rumour bitcoin is anonymous and cannot be tracked has always been a myth. From the very beginning, bitcoin was not designed to be 100% anonymous, the best it ever did was being pseudo-anonymous.

jmigdlc99 has already indicated that converting BTC <-> fiat is one of the identification points. However, buying BTC with fiat and buying physical good with BTC is just as dangerous.
Exchanges use KYC regulations, localbitcoins might attrackt undercover LE buyers/sellers, ATM's have camera's... Every website is tracking your ip... And every on-chain transaction is on an unencrypted public ledger forever...

a smartphone can also get compromised, and is rather easily lost/stolen. Also, the private keys are kept on an online device, which is also not so good for long term storage

This feature is just a tool to make your life easyer.
If you can't get it to work, you can always use preev.com to look up the current conversion rate. It's a bitcoin wallet afterall (not a british pound wallet), the price conversion doesn't really matter from a technical point of view.

i would seriously discourage the use of brain wallets... The human brain is a terrible source of entropy.

To store a large amount of BTC, there are 3 good options:

• a paper wallet (as discussed before): if generated correctly, great for longterm storage, not so good for dayly transactions
• a hardware wallet: sets you back between $50 and $150, but very secure and easy to use on a daily basis
• a wallet on an airgapped PC: very secure, little harder to use, and requires a spare pc... There are some linux distro's available to help you with setting up an offline (airgapped) wallet

you could use electrum => create a new HD wallet, then export the xpub and use this xpub to derive new addresses on your ecommerce site.
This way, you can derive as many addresses as you want without the xprv (or any derived private key for that matter) ever touching your server.

If you want extra security, you can generate the electrum wallet on an airgapped machine, or use a hardware wallet (they're HD to)

Since you're talking about saving bitcoins, the safest options are:

• A hardware wallet (i own both a ledger nano S and a trezor, both cost less than $100 and provide a lot of security while still being easy to use)
• A paper wallet (very secure if generated in a proper way, but their primary function is to store funds for a very long time without using the funds themselfs)
• A wallet on an airgapped PC (you need an extra pc, and using an a wallet on an airgapped pc is quite a drag, since you have to transfer signed/unsigned tx's to and from the airgapped device for signing/broadcasting)

Unless you're going to pick the most unsafe option around (an online wallet, or an exchange), your country (or your currency) does not matter...

AFAIK, mycelium is an android SPV HD wallet, while electrum can be installed on linux, windows, mac, android,... The only popular platform they don't support seems to be the iphone.
I wouldn't put all my BTC on a mobile wallet to begin with, just because a mobile phone can be lost/stolen quite easily... But that's just my personal opinion

Nobody will be able to give a defenitive answer to this question... Some people will tell you they think BTC will reach $10k before the end of the year, others will tell you they have credible calculations to support their theory it'll fall to $5k in a couple of weeks.

Personally, i'd suggest you have a look at the speculation subforum, and read up on bitcoin. If you personally believe it will rise, you can invest a little bit of your money. But never invest more than you're confortable losing. At any rate, bitcoin is a high risk/high reward investment.

Btw: you do know you don't have to buy 1 BTC at a time, right? Bitcoin has 8 decimals, the smallest amount you can theoretically buy is 0.00000001 BTC

This question pops up at least once a week, i always give the same answer: whenever you have a question about btc, use the google custom search on this forum before opening a new thread => click the magnifying glass at the top right corner, enter your question in the google custom search field, and press "google search".

Here you go:

https://cse.google.com/cse?cx=016660200577587308545%3Aesf40ml9aag&ie=UTF-8&q=What+Happens+to+Bitcoin+After+All+21+Million+are+Mined%3F&sa=Google+search#gsc.tab=0&gsc.q=What%20Happens%20to%20Bitcoin%20After%20All%2021%20Million%20are%20Mined%3F&gsc.page=1

You're missing some basic points about mining here... I suggest you read up on what mining really is.

I'll try to give a short explanation about the things you're missing... Don't take this as an absolute truth, i skipped some of the things that are a bit harder to grasp for a beginner!
You don't mine a single transaction... You collect and verify all transactions that are being broadcasted, then you use these verified transactions from your mempool to puzzle together a 1 Mb block (since segwit was activated, the block itself can be bigger than 1 Mb, since the witnessdata can be placed at the end). You then create a valid block header, using the hash of the previous block, the merkle tree of all transactions in your block, a nonce and some other data and start incrementing the nonce and creating a sha256 hash of the sha256 hash of the header with the current nonce.
Only if you find a header whose hash is  under the current target, you solved the block. If the hash is over the current target (which it allmost always is), you need to increment the nonce and try again...
The difficulty is adjusted every 2016 blocks, to make sure the average time between 2 blocks being found by ALL miners in the COMPLETE network is about 10 minutes.

So, to make it easy to understand: there are thousands of people out there, running machines especially made for creating sha256d hashes... Those 1000's of people running those specialised hardware find about 6 blocks an hour. What do you think your odds are if you want to find a valid block using a qt wallet running on your local PC... I can tell you that these odds are very close to 0.

Basically, the first versions of the wallet allowed you to mine directly from your wallet, but the feature has long been removed since the diff is so high that cpu mining (and gpu mining) are dead. At the time the feature was introduced, there were only a couple guys mining, and everybody was using their CPU. Nowadays, it would be ludacrous to even try this route.

bitcoin-cli listtransactions
=> get the txid
bitcoin-cli getrawtransaction "txid"
=> get the raw transaction
bitcoin-cli decoderawtransaction "rawtransaction"

Now, you'll see about anything you need in json format:

• the txid
• the size
• all info about all inputs (txid,  vout, signatures,...)
• all info about the  outputs (value, n, scripts, type, addresses,...)
• ...

If you don't need all this info, you can also receive part of the information using one step less:
bitcoin-cli listtransactions
=> get the txid
bitcoin-cli gettransaction "txid"

Using these steps, you'll see part of the info

Do you mean abandontransaction?
In that case, if you didn't see an error message, i wouldn't worry about it anymore.. You abandoned the transaction, that's all you needed to do

I dug up an old tool i wrote a long time ago... It still works for transactions sent from a non-segwit wallet (which is ok in your case, the wallet you use is not a segwit wallet):

https://www.mocacinno.com/feecheck.php?txid=2465e09a1221e243f7f72abc6eeebb319de742a8ec71465a45ae56facc1200b9

The fee is based on the SIZE of the transaction, not on the value of the output... A transaction with an output value of $33.78 can have a size of 225 bytes or 2000 bytes (or even more, or anything in between), it all depends on the number of inputs and outputs, and has nothing to do with the value...

In your case,  23 sat/byte isn't sufficient...
The link i posted also contains possible ways of fixing your problem. Eventough the tool is old, and desperately needs some updates, most tips and tricks are still valid.

Good luck!

the answer is somewhere between "not in a million years" and "no way". CPU/GPU mining Bitcoin has been death for years now. Since you asked about altcoins: that might be possible, but you should ask this question in the altcoin mining subforum. The guys that frequent that part of the board will probably be able to give you some usefull advice about that topic

Since this question comes up more than it should, i generated a calculator to prove this statement:
https://www.mocacinno.com/nonspecialisedmininghardware.php

If the table is TL;DR; here's the breakdown:
At 20 cents (dollarcents) / Kwu, your i5 will mine at a net loss of $131,39/year. Your GPU will mine at a net loss of about $490/year (it is more efficient, but it draws a lot more expensive power).

Like i said: altcoin mining *might* be something you can do, altough at your electricity rate (which is about the same as mine, i actually live in a country neighboring Germany), i highly doubt you'll make some money (but in the altcoin section, i can be wrong)

I'm glad to see you got it solved, however, there is one thing i wanted to clarify:
walletbroadcast  => Make the wallet broadcast transactions
zapwallettxes => Delete all wallet transactions and only recover those parts of the blockchain through -rescan on startup
source: https://en.bitcoin.it/wiki/Running_Bitcoin

There is a big difference between the two: the option you used just makes sure your wallet doesn't rebroadcast your transaction. The second option (zapwallettxes) makes sure the transaction is deleted from your wallet, so it'll never be rebroadcasted (since your wallet simply deleted the transaction).