Bitcoin's dormant supply, estimated at 3.5–4 million BTC or 18% of the total supply, is raising concerns about potential market impacts from quantum computing advancements. These dormant coins, often referred to as "zombie" coins, could be reactivated if quantum breakthroughs enable the cracking of legacy P2PK wallets. In response, developers have integrated BIP 360, introducing "Pay-to-Merkle-Root" (P2MR) to protect Taproot addresses from quantum attacks. Despite fears of quantum threats, institutional investors have absorbed nearly 3 million BTC since 2020, providing a significant liquidity buffer. On-chain analytics reveal that Bitcoin's total circulating supply is approximately 20.34 million BTC, with 0.66 million yet to be mined. The distribution includes 8.63 million BTC held by retail investors, 2.30 million by exchanges, and 1.80 million by miners, among others. While quantum computing concerns have contributed to Bitcoin's recent underperformance, the market's resilience suggests that the threat may be overestimated.