«Bitcoin’s center of hash today is somewhere near the center of the Earth, perhaps a bit closer to China. This may change as humanity expands and bitcoin miners set up in orbit or on Luna. But bitcoin’s center of hash is likely to always remain within a few light-seconds distance of the center of the Earth.
This will have deep consequences for the future expansion of human civilization.»
https://unchained.com/bitcoin-astronomy/the-law-of-hash-horizons