No, you can not use private key to create watch-only wallet, you can only use it to recover wallet in which the whole wallet will be regenerated. To create a watch-only wallet, you need the master public key or the addresses to be imported as hosseinimr93 explained.

I have just tested out https://www.walletexplorer.com/, it works perfectly, less than 5 seconds. But, what I noticed is that it has a way to link transactions from exchanges by tracking the withdrawal transactions on such exchanges. If you have not make withdrawal from the exchange, it will definitely not work, but if you have withdrawn bitcoin from the address on the exchange, it will be able to track the txid as it is connected to many addresses and know it is from the exchange, the site uses withdrawal transactions hash of such exchanges and some other sites which will be used to know the exchange.

That private key does not ended in the red bracket you used for demarcation. Also know that cryptography is wider, the example above like the one below is an 'Elliptical Curve Keys created using OpenSSL' not the way bitcoin private key is created. This is used in generating a self-signed certificate
https://www.scottbrady91.com/OpenSSL/Creating-Elliptical-Curve-Keys-using-OpenSSL

-----BEGIN EC PRIVATE KEY-----
MHcCAQEEIKEubpBiHkZQYlORbCy8gGTz8tzrWsjBJA6GfFCrQ98coAoGCCqGSM49
AwEHoUQDQgAEOr6rMmRRNKuZuwws/hWwFTM6ECEEaJGGARCJUO4UfoURl8b4JThG
t8VDFKeR2i+ZxE+xh/wTBaJ/zvtSqZiNnQ==
-----END EC PRIVATE KEY-----

NotATether has commented about how bitcoin private keys looks like, the WIF-compressed starts with either K or L while the WIF starts with 5. To do that, bitaddress.org is enough. There is another type that is used to generate the WIF-compressed or WIF private key which are in hexadecimal, while the last one starts with 6P if you encrypt your private with BIP38 passphrase. But the wallet import formats start with 5, K or L. For low transaction fee, compressed private key should be used.

On blockchain wallet, after you send the bitcoin, did you notice any change in the address, like it is replace by another? I am not a fan of blockchain wallet though, but I will like to know this. Also from their support, any coin you received on blockchain wallet, the wallet address will change, and from the first link below, it is indicated that blockchain support change address, but will likely appear either if you send bitcoin to someone or you receive bitcoin from someone, unlike electrum that you can control your addresses manually which is an advantage.

https://support.blockchain.com/hc/en-us/articles/360000574523-My-receiving-requesting-address-has-changed
https://support.blockchain.com/hc/en-us/articles/360018566291-Change-addresses

I am not only specifying on blockchain wallet, I am just implying that sender can be able to spend from change address UTXO to perform child-pay-for-parent also.

Like on electrum, if I am the sender, and I have change address (in the unconfirmed transaction), I can spend from the change address to perform child-pay-for-parent and pay high fee on the child transaction to get my both transactions (child and parent) confirmed earlier, that is what I am pointing out. But, although, I would not do so as I would ON the replace-by-fee so to be able to still pay less fee to pump the transaction if compared to CPFP.

What did you mean by it did not work? The balance was zero (0) or the next button was not available after you input the seed phrase and the extended words?

Please, never mind some of my opinion which I will first address about blockchain.com wallet

• It does not support segwit addresses, making its users to pay more on transaction fee. Nested segwit can reduced fee by 26% while native segwit can reduce fee by 42%
• Like you included in the OP board, it does not support replace-by-fee
• It is a web wallet, most vulnerable to attacks
• Can not spend unconfirmed transaction input(s)

These major reasons should discourage people from using blockchain wallet.

There are some other information that needs to be shared about child-pay-for-parent.

1. The sender if using blockchain wallet, he can still use of child-pay-for-parent if he has change address after broadcasting the transaction, the UTXO (unspent transaction output) which is the change back into sender's wallet another address after broadcasting the transaction, all the sender needs is to spend from the change address UTXO by including funds on the change address in another transaction and send the bitcoin into another own (sender) address, or maybe sending to another person, it will work also. But in this case, the fee should be enough in a way it will cover two transactions to be confirmed earlier, enough fee to cover child transaction, and enough fee to also add up to the parent transactions, which will be paid in the child transaction to get the transaction confirmed earlier.

2. The second case is what is well explained above, but this can only happen if the sender is sending to himself, or tell the receiver to do it. This can be done on wallets like electrum that can spend unconfirmed input transactions, this will make the receiver to spend the transaction into another address on his electrum wallet, but in case he wants to send part of the bitcoin to another person, he can also just use the opportunity, his confirmed transaction and the transaction he sent (to his address or another address) will be confirmed at ones if enough fee is used as explained above, but it should be noted that the receiver has to spend from the unconfirmed transaction input.

Lastly, on electrum wallet, replace-by-fee is by default, but it is not bad to check it as implied.

I think this survey can give useful information about this.
Nearly 10% of the $380 billion in stimulus checks may be used to buy bitcoin and stocks: survey

A new survey out of Mizuho Securities on Monday estimates that 10%, or nearly $40 billion of the $380 billion in direct stimulus checks, may be used to purchase bitcoin and stocks. Mizuho managing director Dan Dolev and his team surveyed approximately 235 individuals with less than $150,000 of household income. Of that, about 200 said they expect to receive the third round of direct stimulus payments in the coming days.



"The survey predicts that bitcoin will account for 60% of total incremental investment spend. We calculate it could add as much as 2-3% to bitcoin's current $1.1t trillion market value," Dolev writes.

1. The money used for it can be used to build industries, what we lack and got us such setback
2. 30,000 naira money is equals to $62.5 monthly which is less than or almost $16 weekly, which is $2.08 daily.
3. Not a permanent job, it is for certain period of time, the Batch C is just for 2 years.
4. A way the youths will not have future, but to leave a miserable life thinking him/her father or mother enemy dey do ham, not knowing sey na Naija government.

All we need is our government to create permanent jobs, high paying ones, we have the resources, but our leaders are not competent to build out nation to be one of the best in the world, but they know how to embezzle money and making the country corrupt.

I no know the latest about N-power, na when you post now I go check about it. I wan make the information about the latest one which na the Batch C clear. I check ham for BBC.



Di Minister of Humanitarian Affairs, madam Sadiya Farouq give dis informate during di process of recruiting and posting of di 500,000 Npower Batch C beneficiaries.

Di N-power scheme dey created for unemployed graduates and non-graduates wey dey di ages of 18 and 35. Di programme na for only two year, during dis time, goment go attach di beneficiaries to any goment job for di state dem dey stay and dem dey pay dem 30,000 thousand naira every month.

N-power get six categories; N-Teach, N-Health, N-Agro, N-Build, N-Creative and N-Tech. N-Teach and N-Health na only for graduates wey don complete di compulsory one year NYSC programme while N-Agro, N-Build, N-Creative and N-Tech dey available to graduates and non-graduates. E get 3 batches, A, B, and C.

Di programme start for 2016. Goment for 2019 say dem don spend about N279bn and about 800,000 young Nigerians don benefit from di scheme.

For 2016, 200,000 beneficiaries na im dey di Batch A and dem spend 43 months instead of di 24 months wey dem suppose dey engaged. For 2018, di goment engage 300,000 beneficiaries for Batch B and wen e reach time for dem to comot for 2020, small drama bin play out as some of di beneficiaries claim say goment still dey owe dem money.

Di latest Batch C na 500,000 beneficiaries.

Reactions, criticisms of di N-power programme
Plenty hailing and condemnation don follow dis programme since e start for 2016. Some see am as better employment and development strategy, odas say di process no pure and e dey stressful plus di money wey e dey gulp too much as dem fit take am build industries for dis youth to dey permanently employed.

Please, I think this should be read
https://www.bbc.com/pidgin/tori-56365022.amp

That will probably just be a Nigerian artist that is not yet known. You can check the real song in the link below, Davido feature Chris Brown. So, that let me guessed the singer in the OP board video is a Nigerian and copied one of the common Nigeria singers  song, 'Blow my mind'.

https://m.youtube.com/watch?v=iSgXrOsE5hE

No, do not see it in other way around, you can see how the Nigerian Central Bank governor depicted cryptocurrencies  with lies and also calling it illegitimate money, I think the song is about people not to trust what CBN are saying about bitcoin. Although, possibly the guy in that vidoe just trying to be famous, but such video is not about worshiping bitcoin, it is about making people to know about it, but worth knowing how to use it before starting using it at all.

First of all, I will like you to know that Coinomi is now a close source wallet some years back, but is one of the best close source wallet, although close source wallet can not be trusted nor recommendable. I was using Coinomi before and so conversant with ways to protect my wallet if my mobile phone or device is stolen.

1. The first layer of protection is to password your phone, anytime you want to use your phone, it will need the password.
2. The second layer of protection is to password Coinomi wallet itself, anytime you want to open the wallet, it will ask for the Coinomi password.
3. The third layer of protection is to encrypt your wallet with a password in a way anytime you want to spend from Coinomi wallet, you will need to input the password.

Note: Never store your seedphrase, passphrase and passwords on device, having it offline is better.

Recommended
128 bits of entropy generate 12 words after checksum, 160 bits generate 15 words, 192 bits generate 18 words, 224 bits generate 21 words, 256 bits generate 24 words.

100% prone to attack
96 bits will generate 9 words, 64 bits will generate 6 words, 32 bits will generate 3 words.

It is even states on iamcoleman that 'mnemonics with less than 12 words have low entropy and may be guessed by an attacker' in the process of generate less than 12 words seed phrase.

The source code is on GitHub and recommended by developers including experienced members Bitcointalk community.

Everything about iamcoleman is open source and it is highly recommended. Iamcoleman make use of 128 bits to 256 bits of entropy to generate seed phrase using a open source codes which the 128 bits is even secure enough and safe to use. You have nothing to worry about, it is as secure as it is BIP39 standard using cryptographic secure pseudo random number generator and open source.

I know NFT are non fungible (virtual) like digital paintings. But what makes me confused is that, for example, MurAll (PAINT) at $0.00399200, how is it sold? NFT owners owns a token to prove the authenticity of the artwork, in this regard, will you be the only one that will buy MurAll (PAINT), or others will buy it and use it to trade?

Let me make it more understandable. Assuming I bought $6 million worth of NFT and I have the token with me which proves me to be the right owner, can I list it on exchanges so that people can trade it like bitcoin and other crypto assets like ethereum and litecoin?

This is totally right, and this makes private key to be safe. With the present day technology, no computing can brute force private key, while it is also 100% impossible to reverse the elliptic curve multiplication, it is one-way function and can not be divided to get the private key from the public key, the private/public key cryptography is also called asymmetric cryptography in this regard in a way private key is able to create digital signature to unlock bitcoin from blockchain with the corresponding address in which only the owner of the private key can do this. This is not related to any form of encryption, in which secret is made in form of password to protect the private key, though making such encryption is possible but encryption is not the process to generate private key, this makes asymmetric cryptography to have nothing to do with encryption.

As you know, trading future contracts comes with great risks, the higher the leverage the high the gain it if favours or the higher the loss if otherwise. If bitcoin is at $60000 and you short/sell, if the price decrease like you meant, you will gained, no loss. Also, if you long/buy it and the price of bitcoin increase, that means you also gain. But, if otherwise, it means the trade is a loss in which the money used will be liquidated at a certain price depending on the leverage used, it means if you go short and the price increase, it means loss, or if gone long and the price decrease, the result is also loss.

You can transfer bitcoin from one of your addresses to another on your same wallet, be it legacy, nested segwit or native segwit. But, why using legacy addresses, it do charge higher fee for transactions while using nested segwit comes with low fee while native segwit addresses comes with much more lower fee.

It means the longer the bit of the private key, the more harder you will try to brute force it. The present ones are 256 bits, the size of bitcoin’s private key space, (2^256) is an unfathomably large number. It is approximately 10^77 in decimal. For comparison, the visible universe is estimated to contain 10^80 atoms. Reversing the elliptic curve calculation is impossible, while the present day technology can not brute force such large number as 10^77. Also, the brute force you meant here is when the public key is revealed and used to brute force the private key, not yet when the address is reveal which is now what public should know. If only the address is known, this will be more difficult. I do not want to go much depper into this. But, just know private keys are 100% safe, only what makes them not safe is when you reveal your seed phrase or the private key to another person, it can also be revealed through malware attack on devices.

https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch04.asciidoc#base58

Encryption is not necessary, private key is safe but just for additional protection, and it is optional.

No, protecting it is right word here.

If the private key is known to another person, the person will use it to access the bitcoin the private key controls and used it to unlock the bitcoin on blockchain.

HD wallets is enough for this.

Yes, you are right. But private key does not represent addresses, but private key generates digital signature used to unlock funds stored on blockchain through public key using a digital fingerprint called addresses.

You are also right, but we should also mention send seed phrase as very important, it can generate the private key which means it should be protected like private key, any access to seed phrase also means the private keys can also be accessed and can lead to coin lost.

The default derivation path is native segwit on Android Electrum wallet, but you can import the master private key of nested segwit to give 3-prefix address or that of legacy address to generate 1-prefix addresses. You can also import the private key of such addresses directly on Electrum wallet.

Someone has access to you wallet seed phrase or the private key you imported on the mobile electrum wallet. The best is to not use the compromised wallet again. I have not heard of malware that steals in such this way on Android Electrum wallet, but nothing is impossible when it comes to malware device invading, better to factory reset your phone to free your phone from malware. If you know you want to download wallet on your phone, you will need to protect it against malware by not going online the way you want, making use of ant-malware and visiting the right sites not fake ones that can install malware on your device. Also make sure you trust no one with your seed phrase or private key, someone can get hold of it and use it to compromise your wallet.

I think spamming and trust system are entirely different, if the post of the member is considered spam, the best is to report to moderators, even it does not deserve either neutral or negative trust. Like you implied, trust system are for people you trust which you can award +ve, while the -ve should be for people that are likely moving towards scamming people or that can harm members of this forum. Someone can be tagged neutral if you think he can be trusted but not solid reason(s), although it can be otherwise in which there are many other reasons someone can be tagged neutral in which he is not that trusted but not deserving -ve trust, such person can be tagged neutral also. In these cases, jerry0 has done nothing that deserves him the negative trust, neither has he done anything that deserves him a neutral trust, all to do regarding spamming is to report to moderators, it is moderators that will consider if the account should be temporary banned, permanently banned, or have some posts deleted.