Unintended implications of using a celestial object as a "weight" for a digital currency?
I have a sci-fi universe that's meant to be astronomically accurate, scaled around cataloged stars and known open clusters/nebulae like the Orion Complex or the Hyades. Space faring civilizations rely on luminous stars for FTL as the more luminous stars generate a special particle* any interstellar civilization needs. Aliens are more alien, but not xenocentric (though they're not relevant here).
In the year 2421 Humans are partially unified (but historically was completely unified) under FAHI-The Federal Association of Human Interests. A notable tenet FAHI has is that the organization claims sovereignty on part of every human being and in theory acts on the part of human interests. In practice FAHI ended up acting on terran interests instead due to poor representation for people living in the colonies. A side effect of FAHI making mass colonization of space one of its main tenets.
In order to make a universal currency for humanity that wouldn't to subject to financial fluctuations, the ministry of finance decides on using the mass of a nearby celestial object to give a set weight to the digitized "universal" human currency. There is a set limit of credit that exists in circulation in order to avoid inflation, of which is set at 100 trillion credits. 302
The currency's value is centered around said celestial object. I am a bit back and forth on what celestial object, but for now assume one of the following possibilities:
* Sagittarius-A* super massive black hole
* The Milky Way Galaxy as a whole
* The Sun
* A Nearby neutron star (Like Calvera)
* Earth
Not sure which one would be the most logical or thematic, but the general idea should be the same. A currency that has its weight not in gold, but in a celestial object of arbitrarily defined importance. The issue is I have no clue if using a cosmic object as a currency weight would actually work in practice given the expansionist nature of my human civilization.
Since I am not really good at economics, can anyone who knows their economics tell me what unintended implications of this idea may entail given the scenario and/or celestial object used? I'm not completely sure where to look.
*Detail: The "special particle" in question is called the "Lux Particle". It exists only in the corona of stars and must exist in plasma. Lux Particles allow ships to not only have FTL, but also fast-as-light travel and teleportation for spaceships. Brighter stars have more lux. I might have intentionally devised lux as a way to screw red dwarves over. 302