Traveling through the infinite wasteland

What is the least valuable thing in the Wasteland Era?
Gold, silver, jade, antiques, banknotes... in short, the least valuable thing is "money"!
What is the least valuable thing in peacetime?
Food, steel, cement, cars... in short, nothing is valuable except "money"!
What was the least valuable thing during the war years?
When I can travel through the era of governance, chaos, the apocalypse, and even the past, present and future, various civilizations, and countless parallel worlds..., my wealth will allow countless people in the apocalypse to live happily, allow countless heroes in the chaos to mingle, and bring all the eras to prosperity. millennium!
I will build the largest space-time space on earth——
Empire of wealth!