Coin Control in Sparrow Wallet: the missing piece of your Bitcoin privacy stack

After the Silent Payments post (72 upvotes) and the CoinJoin follow-up, several people asked about the spending side in practice. This is the answer.

You can do everything right — receive via Silent Payments, mix with CoinJoin, run your own node — and then let your wallet auto-select UTXOs when you send, permanently linking your KYC and non-KYC history on-chain. That mistake is irreversible.

This guide covers:

• The Common Input Ownership Heuristic and why it's your main enemy
• The 4 UTXO privacy buckets and the rule of never combining across them
• Manual coin control step by step in Sparrow v2.5.2 (released yesterday)
• Freezing UTXOs, labeling system, change output management
• PayJoin BIP78 support in Sparrow
• Safe consolidation rules and when to consolidate

Full guide: https://davidebtc186.substack.com/p/coin-control-utxo-management