The Quantum Divide between Bitcoin and Ethereum, two major blockchain networks, is becoming more prominent as quantum computing is becoming a serious threat to blockchain systems. However, these two networks are taking different approaches to addressing this vulnerability, often referred to as the “quantum gap’s” approach. While both Bitcoin and Ethers depend on cryptographic systems that could potentially be compromised by sufficiently powerful quantum computers, their approaches differ significantly. While quantum computers do not need to break every wallet at once, they only need access to exposed public keys, potentially compromising older Bitcoin addresses that have already transacted could make them more vulnerable. While most researchers believe that cryptographically relevant quantum computers are still years or even decades away, any significant migration requires extensive coordination, rigorous testing and adoption over multiple years. Bitcoin's approach to quantum risk is guided by its core philosophy: minimize changes, maintain stability, avoid introducing unnecessary complexity at the base layer. Meanwhile, Ethers are pursuing a more proactive strategy, focusing on a post-quantum roadmap that includes a system upgrade rather than a single technical change. The term “post-Quantum cryptography” does not refer to quantum technology itself. The author suggests that while quantum computers pose a significant threat to existing encryption and digital signatures, digital signatures could increase the risk of unauthorized asset transfers if compromised.