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You didn't explain why ypu want to reuse an address.
1. It is possible to re-use addresses, though there is rarely a good reason.
2. Unless I'm missing something, Electrum doesn't let you specify the change address.
3. The size of a transaction does not depend on which addresses are used.
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Can someone tell me how long it would take for the next new block if hash rate suddenly dropped by 50%
If the difficulty drops by 50%, then blocks will be produced twice as fast, assuming that total hash doesn't change. However, because the cost of mining a bitcoin has halved, miners may switch from BCH, increasing the total hash power, and blocks will be even faster. |
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I have some bitcoins that haven't moved since 2011. They are not lost now, but I could lose the private key tomorrow. You can't determine whether or not I have lost the private key by looking at the block chain.
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The fee is not fixed. It can be 0.001, 0.00001, 0.00054321, or even as low as 0.00000001. The amount you pay is the minimum amount that you think is enough to motivate a miner to process your transaction instead of someone else's transaction.
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Made a mistake by sending some Bitcoin to a BitcoinCash wallet. Sent from Exodus to Electron Cash.
Your BTC is recoverable. Get the private key for the address you sent to, and import it into a BTC wallet. |
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It is clear that decimal numbers confuse you, but I think most people understand that 100.00 is the same as 100.0000 or even 100.00000000.
It is not certain that more decimal places will be needed (currently there are 8 places), but I don't think there will be a problem if more are added.
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This fraud in the ICO demonstrates once again that all ICOs must be regulated and the relevant authorities must identify individuals who are about to start releasing their tokens. Decentralization is good, however, it seems to me, not in this case. Otherwise, scammers will greatly undermine confidence in the crypto currency, and investors will refuse to invest in ICO, the process of improving the crypto currency and its introduction into our life will stop.
I disagree. This fraud demonstrates that people should be more careful about who they give their money to. Giving your money to some anonymous group of strangers on the internet is stupid. Regulation is not a cure for stupidity, it encourages it. |
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This is a Bitcoin forum. You might get better answers if you ask in an Ethereum forum.
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I'm new to ICO's. I have a question about how far below the ICO buy in price can a coin could possibly go?
It could go to 0. If nobody wants to buy it, it's value is 0. It could even be negative if for some odd reason you might want to pay someone to take your coins. ... Obviously, they will not sell for less than what they paid, $0.01 (or very few, would). ...
That is a fallacy. People sell at a loss all the time. |
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Probably a scam. Don't send them money.
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Why should you not invest in bitcoins, cryptocurrencies?
Is there any valid reason to stay away from cryptocurrencies?
I think it is good to have some discussion here for our kind information.
You could lose money on your investment. In 2014, bitcoin dropped 80% over two years. It could easily happen again. |
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Articles like this are so biased. According to Bloomberg: Banks globally have paid $321 billion in fines since 2008 for an abundance of regulatory failings from money laundering to market manipulation and terrorist financing, according to data from Boston Consulting Group.
Where is the outrage? AML Bitcoin is a joke. |
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There really is no such thing as a "wallet address". Most wallets will store bitcoins in multiple addresses.
Furthermore, an exchange generally does not store each customer's bitcoins in a unique address.
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I see, so transaction fee wise multiple keys/inputs are a non-issue.
But doesn't this cause still dificulties when you for instance want to - for instance - switch wallets?
I imagine the amount of keys in your wallet will go up constantly (if you have an additional pair everytime you receive coins). And then, when you maybe want to switch wallets you'd have to export all those keypairs and import them to your new wallet. Unless the two wallets (from different developers) use the same data interchange notation (which is unikely imho) youre looking at a lot of effort up to the point where you are effectively locked into a wallet.
A private key is 32 bytes long. A typical MP3 is 100,000 times as big. I don't think there would be a problem moving private keys to a new wallet. Besides, most wallets now don't even store the private keys. They just store the seed. |
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For questions 1 and 2, you can generate multiple addresses with only a single private key, these are called deterministic wallets. It can also be recovered using randomly-generated passphrases that acts as a password.
You are confusing a private key with a seed. They are not the same. A wallet uses its seed to generate private keys. Also, the "randomly-generated passphrase" is not a password. It is a seed. You can use a password to encrypt your seed. What does a seed look like? I expeimented with jaxx and came across a seemingly ranom collection of 12 words having something to do with backups. Is this the seed? Yes. Seeds are typically 12 - 24 random words (from a list). Some wallets call the seed a "recovery phrase" because it can be used to re-create a wallet. |
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For questions 1 and 2, you can generate multiple addresses with only a single private key, these are called deterministic wallets. It can also be recovered using randomly-generated passphrases that acts as a password.
You are confusing a private key with a seed. They are not the same. A wallet uses its seed to generate private keys. Also, the "randomly-generated passphrase" is not a password. It is a seed. You can use a password to encrypt your seed. |
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1)
Does this mean they generate a completely new keypair (including private) for each time you "receive"?
Or is it (not sure if this is possible) a new address which is linked to an existing private key?
Yes, most wallets now generate a new private/public key + address for each receive. An HD wallet generates private keys using the seed. 2)
If it was a new keypair each time and you woud be receiving lots of transactions you'd end up with hundreds of keypairs/addresses with small amounts of coins "in" them.
Would this not make sending coins an insanely difficult task or at least -transaction fee wise- very expensive (you'd have to make hundreds of small transactions)?
The size of the transaction is determined by the number of inputs and outputs, and that is generally the same regardless of whether they use the same address or a different addresses. 3)I noticed the transaction fees with the wallets I looked at are quite high. Is there a software wallet (not mobile only though - I dont trust smartphones  ) which lets you actually chose what you are willing to pay? (I totally don't care if my transaction takes a few days to get picked by a miner and processed.) There are several wallets that let you choose the transaction fee. Mycelium is one. |
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why bitcoin mining difficulty is increased?
I just want to knows that why the bitcoin mining difficulty level is increased and i am afraid of the life of future miners.Maybe in future the miners electricity will cost more than our rewards because of the difficulty level.
Yes. The difficulty will probably increase until the revenue from your mining is less than the cost of your electricity. |
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So I finally got my bank account verified on Coinbase and bought my first bitcoin, and now it's telling me that it will take 10 days for the transaction to go through. Why so long, and is there a faster method?
It takes a long time because it takes 3 -5 days to transfer money between banks in the U.S. using the ACH system, and Coinbase waits until it receives your money before it credits your bitcoins. 10 days seems unusually long, but it without any details it is hard to comment further. The fastest method is face-to-face cash through localbitcoins.com or Mycelium's Local Trader, or buying from a Bitcoin ATM. These options are generally more expensive if they are available. |
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