Six consecutive maximum difficulty adjustments could lock Bitcoin in a 157-year mining freeze. Everyone worries about quantum computers cracking keys, but raw hashrate dominance presents an entirely different threat vector: weaponizing the difficulty adjustment loop. Bitcoin adjusts difficulty every 2,016 blocks with a maximum 4x increase per step. Six consecutive maximum jumps create a 4,096x difficulty multiplier. If a hypothetical quantum miner rapidly mines those blocks and then shuts down, traditional ASIC miners would face an estimated 157-year standstill to clear the next window. The catch is that code determinism doesn't operate in a vacuum. Nodes are run by human operators who will never wait over a century for a single block. A manual difficulty reset or soft fork patch would deploy immediately, proving that human social consensus remains the ultimate circuit breaker against algorithmic griefing.