That will probably work about as well as the proposal to put a data center on Sealand [1]. Or Cryptoland. Or Satoshi Island. Or Blueseed.[2]
Or the Space Kingdom of Asgardia, which launched a successful satellite with some data storage in 2017.[3] That lasted until 2022, when the satellite re-entered.
[1] https://en.wikipedia.org/wiki/Principality_of_Sealand
because no country on earth can utilize full space venture (yet), do you think this treaty will hold if lets say US decide that they would colonize the moon for a start because no one would be able to do anything