I wouldn't suggest blockchain.info for bitcoin... It's an online wallet, you're not in charge of your own private keys, hence you are up to the goodwill of a private company.

If you're somebody who has a limited ammount of different coins, i'd go for the official wallets of these coins... The core wallet for bitcoin, litecoin, dogecoin, ethereum... Do be carefull tough, those core wallets sync and parse the full blockchain, meaning it'll take a lot of bandwith, storage and processing power to run them (especially the first time).

In case you don't have time, bandwith or storage, you can go for SPV HD wallets.
For bitcoin you have (for example) electrum and multibit HD
For litecoin you have electrum for litecoin
For dogecoin you also have a HD wallet
For ethereum => don't know

BTW: on android you have coinomi, it supports several (alt)coins.

It's a nice service, but what about liability? I know, in my country, an architect is liable for the structural problems in his/her design. If he designs a house, and it cracks, has water leakage,.... within the first 20 or 30 years, the insurance from the architects needs to pay for the damages if he made a mistake.
I can only assume this would be a problem when somebody from a different country would create floorplans, or am i mistaking?

I'm not really an expert in this matter, but can't you look at your server's stats? If most visitors are from one specific country, or visit using a proxy, tor, vpn,... You might be under attack. Also the claim timing might give you a clue. If the same address claims at exactly the right time, it might also be an indication.
Maybe you can share your URL, so we can have a look at your faucet?

I'm sorry, but i have to disagree with most of your tips... The following answers are reflecting my personal opinion.

I'm not sure if you can become an expert in gambling... There are odds, there is a house edge. If you're lucky, you can make money (even get rich overnight), if you're unlucky you'll lose everything. It's statistics pure and simple. Some strategies might look great, but in the end, it's all averages, odds and edges, and the house always wins. The exeption might be skill based games. If you're an expert poker player in a room filled with newbies, you might have a big chance to gome home with a lot of coins.

I would never ever suggest anyone to invest in a HYIP. They're basically scams.

If you're talking about cloudmining: there are only a handfull cloudmining companies that are legit. The rest are ponzi's... If you're talking about homemining: the golden years seem to be over. With a good business plan, good calculations and a good power price, there might still be money to be made, but it's certainly not for anybody that doesn't know what he/she is doing

You are correct... It's a gut feeling, but i think the same way. In my opinion, it's not a proven fact tough.

I don't have enough experience trading, so i'm going to take your word for it.

I was wondering the same, in addition, i'd like to know more stats:
- how many unique visitors/hits (daily/weekly/monthy)
- how many active players in the last month
- is the amount of bets/players rising, falling or staying steady

Next to this i'd like to know what's included (like ca333 already said)
- is it coded from-scratch, or is it a bought script
- is it php/mysql, are there deps
- is the sourcecode human-readable, or is it encoded
- a free push? To where?
- is a database dump included
- are there setup instructions?

I've actually been thinking that if i collect a bit more coins, it might become a good idear to store my paper wallets in a safe deposit box at the local bank. This way, i am safe from home invaders. If somebody breaks into my house in the middle of the night, and asks for my private keys, i can honestly tell them they're at the bank. If the bank ever gets robbed, and my paper wallets get stolen, they're useless to the thief since they're bip38 encrypted (so it might be a good idear to rent 2 deposit boxes in 2 banks to cover all your bases).

At this moment, i think this sounds paranoid since the risks might seems small, but maybe in the future when somebody is known to hold several hundred bitcoins, he/she might become an interesting victim for home invaders with technical knowledge. After all, you're your own bank, so if you hold hundreds of bitcoins, your paper wallets/hardware wallets/cold storage can be physically stolen.

I personally never keep coins in an exchange any longer than i need to in order to buy or sell... To many exchanges went belly-up over the last years.
Offcourse, you can take your change and leave your funds at poloniex, they're a pretty old exchange, but you can never be sure.

Keeping the coins in the original wallets is probably the best thing you could do, like robelneo already said: make sure you backup your wallet.dat!!!

There are a couple in-between sollutions... I tried coinomi on my android phone once (it's a wallet that supports multiple altcoins in one wallet), it seems OK: the private keys are kept on your own device and never sent to the server... It's not as safe as a good desktop wallet tough!

My gut feeling would guide you towards either electrum or multibit HD. They're SPV wallets, meaning they only download headers from central servers, so you don't have to download and sync the full blockchain, while they still keep your private keys on your own computer.
Also, the fact that they can easily be backupped by writing down the seed words on a piece of paper is a big plus.

Electrum allows a bit more coin controll, while multibit HD hides a lot for a new user... They both have their advantages and disadvantages.

Bitcoin core is the 'default' wallet. It has allmost all feature imaginable, but i personally feel the learning curve is a bit steeper, and the syncing might take a couple of days.

I'd personally stay away from online wallets due to safety aspects. Just google for "blockchain.info wallet hacked" or similar, and you'll hopefully see what i mean.

I'm not sure if i completely agree... A miner will look at the ammount of satoshi's per byte. If you use a lot of inputs and outputs, and the mempool is rather full, a 0.0001BTC fee might be waaaay to low, while at slow moments, creating a transaction with one input and one output and aged inputs, 0.0001BTC as a fee might be waaay to high.
I usually either use the dynamic fees my electrum wallet calculated, or i visit https://bitcoinfees.21.co/, look at the size of my transaction (in bytes) and multiply the ammount of satoshi's to get a fast or slow average inclusion time by the ammount of bytes (size of my tx).



No, the fee depends on the size in bytes of your transaction. If you create 1000 transactions with one input and one output, you'll pay the same fee as if you'd send only one (there is no discount).
The thing is, if you create one transaction with, for example 200 inputs and 1000 outputs to replace the 1000 transactions with 1 input and 1 output, you'll usually pay a lot less fee (unless in very rare occasions).

The size of the transaction has NOTHING to do with the ammount of bitcoin you wish to send!!! The only thing is: if you send $5 worth of bitcoin, adding a 50 cent fee is huge, if you're transferring $1000.000 worth of bitcoin, adding a $10 fee is peanuts... That's why i've seen some people adding a way to high fee for bigger transactions. They just outbid everyone, and have a really, really high chance of getting added in the next block (still not 100% tough)

i think allmost all desktop wallets are in fact made especially for this task (can't think of a desktop wallet that doesn't support multiple keys/addresses, there might be some online ones that do no support multiple, but that's a different story). A wallet is basically a piece of software designed to keep track of all your private keys and inputs to your addresses, it's one of the wallet's basic tasks, next to generating transactions and keeping track of the total ammount of funds you hold (inputs - outputs).
A wallet can combine inputs to different adresses to create one or more outputs (and output doesn't have to be created with inputs to a single address), so it shouldn't be 'more expensive' to use different addresses instead of using only one.

A wallet like core generates new addresses each time you request a payment and each time you send coins (it generates a change address to receive your change). It's the default behaviour, it works like this out-of-the-box. If i remember correctly, this behaviour can be modified by editing the bicoin.conf or starting with a command line parameter, altough i have no idear why you should ever do this.

electrum is rather similar. You can either chose to generate a wallet where you import your own private keys, or you can generate a wallet where electrum will also generate new addresses each time you request a payment, or change adresses each time your send funds.

you're both correct, xapo does pay the fee for you. This doesn't mean there is no fee to be payed, it just means xapo pays the bill. Personally, i'm rather weary of such services, if you're not paying, you're the product...

I don't know how they do it, but in order for their business model to be successfull, they have to make money from your account if they're willing to pay for your fee.
This is just my personal sentiment, it's not backed by any mathematical proof.

depends...
the recommanded fees depend on a couple of factors:
- the number of inputs used to create outputs
- the number of outputs
- the age of the inputs
- how long you're willing to wait (on average) to get added to a block

both the number of inputs and outputs make up the transaction size, the bigger the transaction size, the more fees will generally be needed. The size has nothing to do with the ammount of coins you're trying to send!!! it can be cheaper to send 100 BTC in a transaction with 1 input and 1 output than sending 0.00001 btc in a transaction with 10 inputs and one output.

basically,
if you try to use a minimal ammount of inputs and create a minimal ammount of outputs with inputs that were untouched for a couple of months, and you're willing to wait several hours to get included into a block (on average), you can add substantially less fees than when you're using a massive ammount of inputs that were just recently added to create a large ammount of outputs, and you want a reasonably chance of getting added to the next block.

One quick fix would be to let the coins age for a while, and try to generate multiple outputs in one transaction... This way, the single transaction will have a larger size, but the size will probably be smaller than the combined size of the individual transactions you otherwise would have made

Who is giving away these 0.5BTC: you, or the maker of the video?
If it's you, you might want to escrow the funds, that way your giveaway will gain a lot more momentum.

I don't know if OgNasty would hold accounts as collateral. He's strongly opposed to account sales, so he might not like to hold accounts... I know holding accounts as collateral is not the same as selling account, but in case of loan defaults accounts do change hands.

https://bitcointalk.org/index.php?topic=855778.msg13930532#msg13930532

I think you might be better off with people like whywefight or neotox

I'm not an expert, but i think my hunch was correct:
https://blockchain.info/tx/512b84a88f1c07bd55c013f156973855e3d0ae85d517cb549ddf8180762e662e?show_adv=true
1 input of 4.1675, 2 outputs (one 0.1 to 1Myc5HAhMPjq1MatFZaz47gFjjPWc7zJAV, one 4.0675 to 1JCswiVV4SeypsqwXXAFRX85Pe7fGNMPfV)

Since you clearly indicated you were trying to send 0.1BTC as a test, i think it's safe to assume 4.0675 was sent to a change address. I'm reasonably sure the 4.0675 output will pop up as in input as soon as your wallet is synced..

btw: at the moment, this transaction is unconfirmed, you can see in your receiving wallet if there is an unconfirmed incoming transaction? I think most wallets show those.

Well, you probably used an 4 BTC input, and created a 0.1 and a ~3.9 output (the 3.9 going to a change address). Maybe your wallet behaves weird because it isn't synced, so it doesn't see the change yet.
Could you show us the tx id? at this point i'm just making an educated guess.

Are you sure you're not mistaking? Maybe you have two blockchain.info accounts (i presume this is your wallet, since you're talking about the blockchain, and about logging in). I cannot see a single input...
This means it's not the work of a hacker, virus, keylogger,... The address just never had any inputs, hence it is empty.

"The" blockchain isn't down, it's a decentralised ledger stored on thousends of servers and pc's... blockchain.info might have problems (i don't know, i haven't checked).
If i look at this address with a different block explorer:
http://blockr.io/address/info/1YNG7ujEh14ospWf8BHZLSEv4DUW1CtS1

It looks like it had 0 inputs, so it's empty.

I've got Sentinel installed on my android phone. I loaded all my xpubs (eletrum,ledger HW.1, old adresses, vanity adresses,...) and i open this application at least a dozen times each day.

I'd suggest to either use testnet coins to test it out, use use a very cheap altcoin (for example dogecoin) for your tests (0.01 BTC will buy you over 28.000 DOGE), do not run this script with expensive altcoins or with a client on the bitcoin mainchain!!!