Bitcoin needing to stay ahead of quantum computers is like an animal needing to stay ahead of its predator, but the ultimate predator, time, always wins. Eventually quantum computers will destroy bitcoin, we will enter a dark age, and eventually either destroy ourselves, recover enough to repeat the cycle, or finally learn how to leave this universe and enter another where we have better chances for survival. Even a black hole evaporates and the Universe cannot stay ahead of its inevitable heat death.