You might have just answered the question: "WAR what is it good for" sadly the answer is continued human progress
What do you mean by this? Bitcoin is not deflationary, it has a fixed supply. Do you mean technological deflation? If so, I have put together a website that clearly shows why you are wrong for stupendous growth and progress has occurred in the past half century. https://civilizationmetrics.org
Discussion
Yes but only to a point. Once a certain technological threshold is reached it becomes a waste of time and energy. I mean just imagine what effects fusion energy will have. No more wars over oil or land
You're limiting your scope to classic kinetic warfare. Fifth generation warfare spans information, technology, industry, finance, and much more. Earth is a battle field, and sadly not just a place for ice cream and handjobs