You can run a farm on a mobile broadband connection if you're mining on a pool. And that won't change.
If there are cell towers 200 miles from Gnome, Alaska, I am not aware of it.
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Mobile broadband was probably used as in "slow."
Quick search tells me that there are at least 2 internet providers in Nome, Alaska.
In my (unlerned) opinion, "decentralization" is no longer an issue, that bird has flown.
If we can't again achieve distributed mining, then the only thing left for me to do is try to find the best possible exit point to divest.
We are a gnat to the PRC. If we ever grow to the size of a horsefly, we will get swatted and we've given them the best possible flyswatter: >50% of mining hardware.
But even if the ChiComs decide to keep Bitcoin and use it for their own purposes, they could stop or even reverse halvings, create ways to track users, or something worse. If they control the longest chain, they can do whatever the hell they want.
If we are not a threat to the PRC, then Bitcoin has failed. If we are not capable of growing to the point where we could become a threat, then Bitcoin has failed. If we can't recognize this problem, then we won't do anything about it, and Bitcoin will fail.