The Evolution of Privacy Technologies on Bitcoin | Seth For Privacy

— Seth for Privacy, COO of Cake Wallet, transitioned from Monero development to Bitcoin privacy after recognizing Bitcoin's larger user base and greater need for privacy solutions.

— Monero uses RandomX, a custom CPU-friendly mining algorithm designed to resist ASIC centralization, contrasting with Bitcoin's SHA-256 ASIC dominance controlled primarily by Bitmain.

— Silent Payments emerged as a breakthrough privacy technology for Bitcoin, eliminating the need for handshake transactions (required by BIP-47) while maintaining strong on-chain privacy.

— Cake Wallet has implemented Silent Payments for sending and receiving, PayJoin v2 for obfuscating transaction inputs and outputs, and Coin Control to prevent accidental privacy leaks through UTXO commingling.

— Accounts feature (launching soon at Cake) allows users to segregate KYC and non-KYC Bitcoin holdings to prevent inadvertent linking of identity to pseudonymous funds.

— Without a protocol-level soft fork, on-chain privacy tools are largely exhausted; CoinJoin remains problematic due to regulatory pressure and iOS platform limitations.

— Use Coin Control or account-based separation in your wallet to prevent accidentally linking KYC-purchased Bitcoin with non-KYC holdings, which would expose your entire transaction history to surveillance.

— Enable PayJoin v2 (or equivalent privacy-preserving transaction protocols) by default in your workflow to erode chain-analysis companies' reliance on the common-input-ownership heuristic.

— Consider Silent Payments as a reusable privacy address for receiving Bitcoin if your wallet supports it; post the address publicly without revealing your transaction history, though accept that first-time sync may take several minutes.