Bitcoin Core is programmed to decide which blockchain contains valid transactions. The users of Bitcoin
Bitcoin Core is programmed to decide which blockchain contains valid transactions. The users of Bitcoin Core only accept transactions for that blockchain, making it the Bitcoin blockchain that everyone else wants to use.
It is these users who keep Bitcoin decentralized. They individually run their own Bitcoin Core full nodes, and each of those full nodes separately follows the exact same rules to decide which blockchain is valid.
There’s no voting or other corruptible process involved: there’s just individual software following identical rules “math” to evaluate identical blocks and coming to identical conclusions about which blockchain is valid.
This shared agreement (called consensus) allows people like you to only accept valid bitcoins, enforcing Bitcoin’s rules against even the most powerful miners. In addition to improving Bitcoin’s decentralization, Bitcoin Core users get:
Better security for their bitcoins
Privacy features not available in other wallets
User interfaces and other powerful features
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