I have troubles verifying the .zip from github with the provided pgp key... how do you verify this .zip offline in Ubuntu?

I've read that in case of a blocked transaction, one can ask a miner to explicitly confirm it, how this can work if nobody will know who'll win the block to be added in the blockchain? I mean, if that miner that mines as part of o mining pool, can do that, myself (assumed as independent miner) cannot do the same?
Should I understand that the mining pools have the 1st chance to mine the block, so, in fact when a miner attempts to confirm that transaction, he/she will just manually add it to their next lot of transactions from the mempool but still there is no warranty they'll succeed?

In case a transaction is not processed for weeks, is it feasible that I install myself Bitcoin Core as full node and to validate the transaction myself?

hi,

I would like to have a quotation from those willing to help.
Since EU applied GDPR regulations some US based online shops are not allowing orders from EU citizens anymore (sounds stupid right?)
Basically I need someone that will enter my account on a website and just pay by card, the shopping cart will be prepared by me, you have only to pay and fill your billing address that is a MUST to be an US one.
The shipping address will be also set by me to minimize the risk for any mistake.

The website is old and has its reputation in US, the goods are just fishing gear (no shipping restrictions within US).

I can pay by Paypal, TransferWise, I have no BTC yet and don't know yet how to use escrow system but hopefully one day I'll have some Trust points here that we can get rid of escrow service. Btw, what escrow service you're using?

So, it's about 10mins task for you to place the order already partially prepared by me, how much would you charge for this task?

Alternatively, do you have any suggestion how to do this task without trying to make friends on facebook?
Please note this is about 1-3 times a year task, it's for my personal use, I'm not a merchant but just an angler in my free time looking to improve my gear

Ok, after more research I have a theoretical view on the fees charged for investing in bitcoin with fiat from your bank account then returning fiat back to your bank account:

step1) buy BTC via bank transfer (no fee for SEPA)
step2) for holding, transfer BTC to safe wallet -> withdraw fee: 0.0005BTC
step3) deposit BTC from your safe wallet back to binance wallet -> https://www.buybitcoinworldwide.com/fee-calculator/
= 0.1 - 5EUR dependiing if you're in a hurry or not (assumption 1:1 as inputs and outputs)
step4) convert / exchange BTC to EUR -> 0.1% binance fee
step5) withdraw EUR to your bank account -> 0 fee

Concrete example based on initial investment as 1000EUR:

step1) buy BTC via bank transfer as 1000EUR worth -> 0.044171BTC
step2) for holding, transfer BTC to safe wallet -> withdraw fee: 0.0005BTC => 0.043671BTC in your safe wallet
step3) deposit BTC from your safe wallet back to binance wallet -> assume 0.0002BTC mining fee -> 0.043471BTC in your binance account
step4) convert / exchange BTC to EUR -> 0.1% binance fee => 0.043427529BTC to EUR (assumed same value as in step 1) = ~983eur
step5) withdraw EUR to your bank account -> 0 fee -> ~983EUR in your bank account

This means in order to have a profit you have to take care of the BTC/EUR ratio to cover the Binance trading fee (0.1%) withdraw fee 0.0005BTC and mining fee (~0.0002BTC)

Is this calculation correct? (the steps at least as the actual figures depend on the market trend and mining fees)

Another question, is there a limit to the amount you can withdraw from binance account per transaction / day / month as fiat?

if I buy BTC, my balance will be charged with the current value of the BTC or with the one BTC will have whenever the transaction will be confirmed?

@tranthidung, as it's a beginner section, can you explain the meaning for your table header (columns meaning) ?

many thanks and keep up your nice work!

That's the issue, there are many very good threads that should be pinned in order that the next newbie comes will not have to raise same questions again or one existing pinned post (like the one created by Lauda) should be extended, any moderator per section or global moderator /admin can edit posts.
Thanks to some old members that knew keywords to use for searching, I managed to cover some of my 10 points I addressed in the initial post.

Do you have by chance some maths/probability calculation for one attacker attempting to hit a 12 words seed for Electrum wallet? I guess the possibilities are higher than using random private key of 32 characters as brute force can be done using a dictionary?
I see a thread about an Electrum wallet hacked while its seed was on paper (of course no details under which conditions that seed was created).

I add here a good read taken from an unpinned good thread: https://en.bitcoin.it/wiki/Techniques_to_reduce_transaction_fees

great post, still one short question for Windows users: it's not enough to download the .exe (either installer or standalone) and to check its properties for digital signature, to see the certificates used? Can an attacker resign such .exe files with new certificates to mimic the original ones?

not at all, my side comment was linked to a website I own hosted by a company that offered me cpanel access and I found under my account weird files (scripts) that were not mine, still no change on my pages.

I did not make the step to buy any crypto yet, I'm still in the learning phase, see my starter thread here: https://bitcointalk.org/index.php?topic=5301688.0

Buy something that you consider you'll resell after, take aliexpress / alibaba or ebay (or other auction sites) as reference then sell online on your local specialized sites.
Take care about the customs / tax.
There is risk you'll have money blocked in these products so try to figure what people would buy first.
It's not 100% pure online job but you can arrange shipping in a way you won't get out from  your home if that's possible from your country.

Try freelancer.com, bid small to get high rating afterwards so you'll be better seen by those who would need similar services from you (I liked the rentacoder version years in the past though)

Get an Adsense account and place ads on your blogs, this won't warranty income since you're not allowed to ask for clicks, additionally you can place donate buttons/links to your blogs

Write a digital book that you can sell online, still tendency is to get everything for free from internet (which is the beauty of it)

Create audiobook that you can sell online (personally I like audiobooks to listen to while driving)

I know people are becoming so desperate sometimes that go for videochat or gambling

If none can work for you, you have the robot like tasks for clicks, survey, data entry etc that you know already.

I'm sure there are very good threads that can be really helpful a newbie to start with if they would have known about their existence therefore such must read threads should be pinned by a moderator...
The Index thread above is such example to be pinned but how to better organize this section as the only section moderator seems to not be active since 2018? https://bitcointalk.org/index.php?action=profile;u=14001

The search is also good but its results requires time to process and to fine tune your next search and to not mentioned the weird feature of setting timer between sequenced searches for a new user!

I didn't know about that...huh still, any moderator (to not mention an admin) can do merging or reopen closed threads.
Considering the amount of registered users (more than 1 million) and daily activity, multiple moderators are needed to cope with the work to be done.

That's a "funny" quote and looks like  a "q.e.d"
The chances are increased when one is not targeting a particular address but any, the higher number of BTC users (valid keys) the higher chance someone will still have a hit, however the chances are still very low as the maths/probability can demonstrate.

I got hacked twice so far but still I don't know if it was due to poor password (which was not the case according to the specific tools around) or just a typical cpanel vulnerability that the hosting did not bother to patch or there was no patch by that time.
For an IT guy this kind of things are very frustrating when they happen

If one can notify @Lauda to merge / extend his/her post it'll be great

Original Post (or OP as you like to type ): https://bitcointalk.org/index.php?topic=1689727.0

I used to be a mod on different kind of forums so excuse my habit.

I would like here to collect all suggestions for new clusters/topics to be included in such "Newbies - Read before posting" pinned post.

I see the need for following references to be added:

1. Fees - how are they calculated, what are the tips/tricks to get lower fees
2. The maths behind private key and public address - there are some good reads thread on this already
3. Where to buy BTC? best 3 options
4. Top 3 (5) best centralized service to be used for exchange (use if possible a poll with the mostly referred sites)
5. Pinned post (single post) about how to generate safe a paper wallet, transfer funds to it, withdraw and convert to fiat
6. Same like 4, simplified version for using HW wallet and SW wallet
7. Top 3 (5) best mobile wallet (use a poll for that)
8. Transactions - how to create offline transaction, how to optimize its costs? How long a transaction can stay unconfirmed? Can it be lost / can it expire if it's not processed within a certain time? Can you set a transaction with 0BTC fee between your own wallets / addresses?
9. Lessons learned - a collection of user's bad experiences - what went wrong and what are the best experiences - brief statements not letters
10. Small intro into Trading BTC - what's the percentage a certain currency should evolve or a fixed value in order to have profit after you'll exclude the fees?

Feel free either to provide some answers or for other suggestions to complete such "Newbies - Read before posting" guide

great tips, it helped me also to find another interesting thread to read: https://bitcointalk.org/index.php?topic=2848987.0

I'll read again the Newbies pinned thread as I can't remember seeing anything about fees so such topic is a must read for beginners.

finally some numbers
so, binance is best for such fees among centralized services however best option for buying is P2P (something that I could deduce).
Still for selling back/withdrawing cash, I guess again the best option is P2P (so to sell to someone who would like to buy with fiat) or for centralized still binance as best service?

I used to buy fiat this way, small amounts during several days till I reached the sum I needed, of course it can apply to crypto.
My observation during the years (still, I'm not a trader or any financial analyst or so), during Christmas period, at least in my country, the EUR/USD tends to go down so it's good moment to buy. Now you say for crypto it might go down after NYE, I'm sure others in this crypto world found similar patterns so we'll see...maybe neither a bull nor bear season will start but a rabbit one, whatever that will be haha 

I hope this is not in the end pure gambling but more like educated guess, watching the world's events and trends for other currencies should help, right?