Follow the rationale:
1. Nation states ultimately control three key infrastructure pieces required to run data centers (a) land (protected by sovereign armed forces) (b) internet / internet infra (c) electricity. If crypto ever became a legitimate threat, nation states could simply seize any one of or all these three and basically negate any use of crypto.
2. So, if you have data centers that no longer rely on power derived from a nation state, land controller by a nation state or connectivity provided by the nation state's cabling infra, then you can always access your currency and assets.
Fiscal rules are sort of man made.
The US Government further publishes tracking on pretty much every single thing in orbit of the earth larger than a few centimeters, to help satellite operators avoid space debris. They do obfuscate the current orbit of their own spy satellites (only publishing their initial orbit), but other countries and even private citizens around the world keep obsessive tabs on these things (e.g. https://sattrackcam.blogspot.com/). This sort of thing is easily within the reach of even a medium sized nation state that was interested in the investment: just need a couple of big ole radars and you can do it just like the US does. So if you do try and hide the resources of a nation-state can easily counter.
The solution to oppressive government is not technological, it's political. Prevent countries from going bad, retrieve the ones that have gone bad, it works out a lot better for everyone.