The Bitcoin blockchain is a record of all bitcoin transactions that have occurred over time, from the genesis block in 2009 to now. The first step in utilizing this public ledger and sending bitcoin across the network, is creating a wallet and funding it with some bitcoin.
A wallet is simply a file on your computer or mobile phone that contains private keys generated by your Bitcoin wallet app. These private keys are much like passwords and are meant to be kept completely secret. Only a wallet’s true owner should be able to access the private keys, as the keys allow anyone in their possession to send funds around in the Bitcoin network.
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