CISA has a notable impact by encouraging the inclusion of more inputs in a single transaction, typically owned by the same individual, regardless of the privacy enhancements offered by layer 2 solutions or mechanisms designed for collaborative transactions. This approach does not only pose concerns regarding user privacy but also presents significant challenges to the current methodologies employed in coin selection within cryptocurrency transactions. These challenges necessitate a reevaluation and potential adaptation of coin selection algorithms to accommodate the nuances introduced by CISA, ensuring that transactions remain secure and private while optimizing the efficiency and effectiveness of the coin selection process.