The Bitcoin community is actively exploring advanced quantum-safe signature schemes to enhance the protocol's security and functionality. Discussions focus on implementing OP_CAT to construct Winternitz signatures, integrating STARK verification as a native script capability, and optimizing the on-chain cost of hash signature schemes. These technical upgrades aim to simplify and standardize native 'Vaults' constructions, enabling features like delayed withdrawals and cancellation windows, thus advancing programmable self-custody at the protocol level.