Looking back over the past decade, the narrative of blockchain privacy has been constantly reshaped. In the first cycle (2014–2017), privacy was largely understood as the anonymity of value transfer, with Monero and Dash becoming synonymous with extreme privacy; in the second cycle (2018–2021), zero-knowledge proofs experienced theoretical and engineering breakthroughs, but industry attention mainly turned to scalability and performance, with privacy capabilities often existing as ancillary modules; until the third cycle (2022–2025), against the backdrop of strengthened on-chain compliance, significantly improved monitoring capabilities, and the full entry of stablecoins and institutional funds, privacy was once again recognized as a fundamental condition for financial and commercial operations, rather than a marginal demand. Privacy issues have not disappeared, but have been obscured by different narratives at different stages.

The current wave of privacy revival in 2025 is not driven by a resurgence of ideology, but directly triggered by real-world friction. As stablecoins, DeFi, perpetual contracts, and RWAs gradually scale, fully transparent public ledgers begin to expose structural risks in actual business: trading strategies are easily analyzed in advance, capital allocation may leak competitive signals, and on-chain behaviors of enterprises and institutions are continuously profiled. Against this backdrop, the advancement of global regulatory frameworks compresses the activity space of 'fully untraceable assets' on one hand, while also objectively strengthening the demand for financial infrastructure that is verifiable but not publicly detailed, default private but can be disclosed in compliance. This bidirectional push constitutes the realistic foundation for the gradual differentiation of privacy assets and highly transparent assets in 2025.

However, it is important to emphasize that the privacy track itself also faces multiple unresolved challenges. On the technical level, solutions like ZK, FHE, and MPC still present significant trade-offs between performance, development complexity, and composability; the stronger the privacy, the higher the system complexity and usage threshold often are. On the architectural level, privacy mechanisms can easily lead to liquidity fragmentation and insufficient observability, increasing the difficulty of risk management and system governance. On the compliance level, there are significant differences in the definition of 'anonymity-enhancing features' across different jurisdictions, and long-term policy uncertainties still exist. This means that privacy is not a unidirectional linear competitive track, but rather a complex path that needs continuous calibration among engineering, economics, and institutions.

The key to this round of change is not a specific privacy chain or a certain cryptographic technology, but the functional migration of privacy: from 'certain assets possessing privacy' to 'whether the system supports privacy states'. Whether it is hidden orders or batch processing execution, or auditable concealed addresses, selective disclosure of liquidity pools, privacy begins to be embedded in transactions, settlements, governance, and strategy execution itself. With technological development, privacy is no longer a selling point of isolated networks, but a fundamental constraint condition for the normal operation of various Web3 systems.

Therefore, the real question we need to discuss is whether Web3 can rebuild privacy capabilities while maintaining composability and compliance. In the short term, privacy will still exist in the form of value-added services, professional tools, and high-end features; but from a ten-year perspective, mainstream systems will inevitably move towards a structure of 'default privacy + regulatory compliance', just like HTTPS for the internet. Privacy will not revert to early singular imaginations, nor will it disappear outside of mainstream systems, but is more likely to evolve into an initial and foundational attribute within Web3 infrastructure. The year 2025 is not the endpoint of privacy, but rather a historical turning point as it moves from the margins to the foundation.