The problem is when your empire loses its weapons but all the others still have theirs. Think China's trade policy is unfair now? Imagine if we had no tools for monetary policy. There would be much laughter in Beijing.

Only multilateral disarmament works for game theoretic reasons. I don't think soft disarmament in areas like aggressive monetary policy can be done until hard disarmament happens, so I write that stuff off until we've had at least 50 years with no major war anywhere on Earth. (Most smaller wars are proxy wars between major powers.)

Like most major innovations Bitcoin is ahead of its time. Maybe on Mars...