Government monetary systems are all inflationary, for a lot of very good reasons.

Governmental monetary systems have been used by every government for what now? 3000 years?

Humans didn't have the technology to build a decentralized currency for 3000 years. That tech was invented only 17 years back

3000 years from now what would be the store of value would be the question to ask.

I'm fine with letting decentralized currency maturing for say, 300 years, in some small corner of the world, before letting it loose on the rest of us.

They're founded on the shared illusion that the money they create is worth something, and the fact that this works pretty well is arguably one of the most important achievements of human civilization.

Military Might ( and hopes and prayers)

Depends on the particular government. The ones that are heavy on hopes and prayers usually don’t do well though.

You still have to pay infrastructure deprecation costs, financing costs and labor costs.