The advent of the quantum era presents significant challenges alongside technological opportunities. In particular, the advancement of Quantum Computing (QC) has the potential to neutralize existing encryption methods, posing a major threat to digital asset security. Recognizing these issues, the U.S. government has announced a strategy to build a defense system using Post-Quantum Cryptography (PQC) technology to protect digital assets from such threats. On March 8, 2026, the Trump administration officially unveiled a new cybersecurity strategy mandating the application of PQC technology to all blockchain and cryptocurrency infrastructure by March 2026. This policy, elevating the transition to quantum-resistant cryptographic standards from a mere recommendation to a compliance requirement, is garnering significant international attention. The core of the problem lies in the potential for quantum computing to invalidate existing encryption technologies. Analysis suggests that currently widely used cryptographic algorithms could be vulnerable to the computational power of quantum computers. Complex ciphers that would take hundreds or thousands of years to crack with conventional hacking methods are now projected to be decipherable in a short time by quantum computers. Of particular concern is the 'harvest now, decrypt later' attack. This refers to the method of collecting encrypted data now and decrypting it later when quantum computers are sufficiently advanced. Therefore, the U.S. government's attempt to apply PQC to digital assets and blockchain structures can be seen as a preemptive measure to block such potential threats. The U.S. White House explicitly stated defense against 'harvest now, decrypt later' attacks as a primary goal of this policy, presenting a detailed roadmap. To date, the application of PQC remains controversial due to the significant technical challenges it entails. Especially for decentralized networks like Bitcoin, transitioning cryptographic technology means more than just simple code changes. This necessitates consensus and cooperation from the global community, along with thorough testing processes to maintain compatibility with existing systems. Upgrading the fundamental cryptographic primitives in decentralized networks like Bitcoin is expected to pose significant technical challenges, requiring broad community consensus and extensive engineering efforts. This process will demand substantial costs and technical expertise, potentially creating a major barrier for smaller developers with limited funds and time. All relevant companies, from Decentralized Finance (DeFi) platforms to blockchain-based financial services, must prepare for this transition. Digital Asset Environment Changing with PQC Adoption The economic repercussions of the mandatory PQC policy on the digital asset market are also noteworthy. From Decentralized Finance (DeFi) to traditional financial institutions, the additional costs for implementing PQC will be substantial. This policy transforms PQC adoption from a mere recommendation into a potential compliance requirement, directly impacting the operational costs and development priorities of both decentralized finance and traditional financial institutions utilizing blockchain. Companies will need to reallocate engineering resources and redesign systems to align with new cryptographic standards, incurring significant financial burdens in the process. Conversely, however, such investments also hold the potential to spur further innovation. This is because if PQC technology is successfully implemented, it will open new horizons for data security and is highly likely to rapidly spread to other industrial sectors such as finance, healthcare, and energy. Indeed, this policy is not limited to digital assets; if successfully executed, it could serve as a blueprint for expanding PQC transition to other critical infrastructure sectors. However, some voices strongly criticize the necessity of PQC adoption. Some critics point out that quantum computer technology itself is still in its nascent stages. Arguments are also being made that currently available quantum computers are closer to theoretical possibilities than actual threats. Meanwhile, many companies are expressing concerns about practical issues on the ground, such as financial market uncertainty, rising costs, and regulatory burdens that will arise from mandatory PQC. The short deadline of March 2026, in particular, is putting pressure on the industry. This raises concerns that there may not be sufficient time for technology development, testing, and deployment. Nevertheless, there are strong counterarguments that delaying preparations now due to future uncertainties could lead to greater costs later. Proactive measures to prepare for quantum threats could be a more economical and safer choice in the long run. The U.S. government is not merely stopping at mandatory PQC but is pursuing a more comprehensive quantum te