No i not try to doublespend (we talk about 20$) but someone scammed me he claim that even on 2 confirmation i can double spend.
Please only the real pro should reply here as i need strong evidence about this !
Theoretically yes, in practice, no. In order to do that, you would need to be able to mine three blocks before the rest of the miners find the block for the third confirmation. Those three blocks would have to include the double spending transaction and be a small fork of the blockchain the began on the block before your first confirmation. Ok so in theory it's for a single user impossible unless you have the hardware right ?! Yes. Performing such an attack would require a lot of hardware. In order to have any probability of success, you would need to have greater than 50% of the hash rate. At the current network hashrate, that is incredibly expensive and pretty much impossible. That's the thing. While it is *possible, it is in no way profitable. With each confirmation it becomes exponentially harder and more expensive. The same is true with credit cards. For example, until recently you could not use a credit card at MacDonald's. That is because assuring that the transaction is legitimate costs more than the profit from the transaction. The card companies finally wised up and realized that creating a false transaction also costs more than a MacDonald's meal. So now you can use your card and they just assume that you will act logically and not spend dollars to get pennies. |
|
|
|
Thought it would be fun to see just how
big of a wallet you would need here.
some ROUGH calculations
- 75 billion address key pairs can be stored using 1 terabyte.
- each terabyte can fit into a tiny hard drive measuring 35 cubic centimeters
(Samsungs' new harddrive that is about the size of a business card and maybe .7 cm thick)
- 1 cubic meter has 1M cubic cm
- 28,571 terabytes per cubic meter.
- 2^160 total bitcoin addresses
- 1.94 * 10^37 terabytes to store all those addreses.
Therefore, your wallet requires 6.8*10^32 cubic meters.
Given that the earth is a little more than 10^21 cubic meters,
your wallet would be the volume equivalent to 680 billion earths.
 |
|
|
|
I think yes and there is no doubt about this. I think we will be able in future to you bitcoin as a fiat currency. but for this we need a continuous struggle to make it a fiat currency having same value in all over the world.
So what government created bitcoin? That is what fiat currency is. IT CAN NOT BE FIAT for the same reason it can not be a camel. it does not meet the definition of either. |
|
|
|
|
Short answer: YES
Bitcoin has no authority to demand taxes, its a math program.
Governments have the authority however. In the U.S., ALL MONEY YOU MAKE IS SUBJECT TO TAX LAW. Sometimes your tax rate may be zero, but the laws still apply. In the case of bitcoin you owe capitol gains on the appreciation in value. The rate varies depending on your tax bracket and other factors, but 10% is a normal amount.
Don't kid yourself into thinking that you don't have to pay taxes. All your transactions have been recorded on the blockchain forever and one day the IRS may hand you a bill that also includes penalties and interest. You might even have to do a little jail time.
|
|
|
|
You may want to consider never using a credit card online again? Up your security by doing your shopping with bitcoin. Start with an Overstock.com account. You can buy most anything now with bitcoin. "cashing out" will mean giving up some profit, why do that when overstock gives you 3% off when using BTC?  |
|
|
|
|
The only "smart" way to gamble is to buy a casino and collect the money of the hopelessly mathematically illiterate.
|
|
|
|
|
If all you care about is fiat currency then by all means sell your BTC. If you want to actually join in the revolution then SPEND your coins and never sell again.
|
|
|
|
|
For me a fool is a veteran member that has forgotten how new this all is. We are all newbies here.
|
|
|
|
|
I'm still not worried though. Just as a list of all possible pin numbers could be published, it would still require a brute force of all the possible pin numbers. That process with bitcoin addresses would likely take millions of years. Maybe billions?
|
|
|
|
So if I wrote down all the numbers between 0000 and 9999 would I know your pin number? Nothing to worry about here. |
|
|
|
|
I totally agree. I have not downloaded the game yet, but I know it brings people together in real world locations. Why not have bitcoin trading at "poke spots". or a parallel app that allows buying of stuff you need in the game? Maybe stuff like information, powerups,... I don't play so you tell me. lol
|
|
|
|
There is no such thing as a "Deep or Dark web bitcoin account". All network transactions are visible to all users via the blockchain. So I don't know what those guys are selling, but it is surely a scam.
I think what the OP's trying to tell is the account itself of other people in blockchain. The one they use to login and the one that's holding their wallets. It's possible, right? That makes sense. So a website account rather than a bitcoin wallet. I just don't see how people upload money to be controlled by a website that you can't police. The only thing you can know about the operators of most such websites is that they are criminals. It's crazy to share your private key with criminals. |
|
|
|
|
I think this is always worth mentioning. People seem to forget that there is no bitcoin incorporated or bank to help you do security. If you are doing it correctly, then you are the only one in charge of security. It's sad to see posts asking for the bitcoin "master key" or to have their account "reset".
If you lose access to your private key then no one on Earth can help. Not the NSA, not Satoshi Nakamoto, nobody.
|
|
|
|
... bitcoin will be banned in all western countries. If you are reading this living in the west you should make preparations to move to Russia or China they are the only places you will be safe owning bitcoins. ...
I thought this part was the funniest part.  Russia is about the only place on the planet where bitcoin is actually illegal. I hope nobody took his advice. |
|
|
|
|
There is no such thing as a "Deep or Dark web bitcoin account". All network transactions are visible to all users via the blockchain. So I don't know what those guys are selling, but it is surely a scam.
|
|
|
|
|
I've not yet seen a viable idea for stopping bitcoin. Even though it is often discussed.
I suppose if I spent a billion dollars on mining equipment I might have a chance at forking the chain. But then what? I would likley only cause a temporary disruption and surely I will not cause the idea of crypto-currency to go away. So I have gained nothing and spent a billion dollars.
|
|
|
|
|
So can I buy your bitcoins for $500? Of course not.
In a free market, like bitcoin, the price is what people will pay. Not what we think makes sense or what we hope it will be.
|
|
|
|
|
1337 is "leet speak" for Elite.
|
|
|
|
When your reason for this to happen is your desire for it to happen... It ain't gona happen. |
|
|
|
|
Show Posts
