Bitkey fast-tracks coin control feature after customer demand

Bitkey, the self-custody Bitcoin wallet built by Jack Dorsey’s Block, Inc., is accelerating development of a coin control feature that lets users label individual UTXOs and manually choose which coins to include in a transaction. The move comes directly in response to persistent user feedback. For a wallet that launched publicly in December 2023 and started shipping hardware in March 2024, this is a meaningful step. Why coin control matters more than you think Here’s the thing about Bitcoin transactions: they don’t work like a bank account with a single balance. Instead, your wallet holds a collection of discrete chunks of Bitcoin called UTXOs, or Unspent Transaction Outputs. Think of them like individual bills in a physical wallet. When you spend Bitcoin, your wallet decides which “bills” to use. Most wallets handle this automatically. The problem is that automatic selection can accidentally merge coins from different sources, creating a trail that links your transaction history together. For privacy-conscious users, that’s a dealbreaker. Coin control flips the script. It lets you pick exactly which UTXOs to spend, label them for tracking purposes, and keep different pools of Bitc...