What is The Bitcoin?
Bitcoin (₿) is a cryptocurrency. It is a decentralized digital currency without a central bank or single administrator that can be sent from user to user on the peer-to-peer bitcoin network without the need for intermediaries.
Is it possible to send unconfirmed bitcoins?
There is no such thing as an unconfirmed bitcoin, only transactions.
Every bitcoin transaction you send spends some time as an unconfirmed transaction… That just means any transaction that is sent anywhere before a new block is added to the blockchain with that transaction in it.
New Bitcoin blocks are added at a rate of 10 minutes on average, and each one confirms all the transactions before it. (Yes, back to the 1st bitcoin transaction between Satoshi and Hal!)
The larger your transaction, the more confirmations you should wait before considering it settled. It’s hard to double-spend a bitcoin, so if it’s small (less than $1000?) no one would bother to try to rip you off that way, and after 6 confirmations (1 hour) it’s nearly impossible for anyone to rip you off that way because the computational power requirements would be astronomical.
Bitcoin is a cryptocurrency that is based on the Proof-of-Work (PoW) algorithm. All Bitcoin transactions are conducted with the help of cryptocurrency mining.
If you don’t know what Proof-of-Work is, this might help you: Difference between Proof of Work and Proof of Stake
Once you send a Bitcoin with your wallet, the transaction is going to a memory pool.
Anyway, for a given payment to be processed successfully, it has to be confirmed by a miner. He then gets a block reward for each confirmation. One block represents a set of transactions. Until confirmed, they remain in the pool.
So when is it possible to send unconfirmed Bitcoins?
Every time a new block is published by a miner, the other minder will try to validate the block by checking if everything is correct.
If some transactions are fake, the whole block gets rejected by other miners in the network.
The bitcoin network is designed in a way to force everyone to play by the rules, those who play by the rules get rewarded and those who don’t will get rewarded.
You can only have unauthorized transactions and also approved by miners if 51% of the miners are trying to cheat the system and all working together to cheat the system. This is called the 51% attack.
So it is theoretically possible but impossible in practice.
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