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A Bitcoin node is a computer storing the complete blockchain, verifying all transactions independently. Running a personal node offers:
Complete trustlessness: You don’t rely on third parties for transaction validation.
Privacy: No leaking addresses to centralized servers.
Network strength: Contributes to decentralization by spreading the network.
For users holding significant amounts of Bitcoin, Cole recommends running a node when financially and technically feasible, typically after accumulating more wealth. Pre-built solutions like Start 9 simplify this process and cost around $500, with setup being straightforward.