Which appears to have absolutely nothing to do with crypto mines, and everything to do with controlling what foreign people own real-estate near military installations. The only link to crypto currency is the same rule was once used to remove a Chinese company that bought land close to an air force base, and happened to be using that land (at least ostensibly) for crypto mining.
This appears to be the executive order that removed that Chinese company: https://www.whitehouse.gov/briefing-room/presidential-action...
To the extent that the order relates to crypto currency, it appears to be that the company was bringing in non-standard electronic equipment built in China (unsurprising for a crypto mining company), and the US wasn't confident in their abilities to set up a program to monitor it and ensure that the equipment only did what it said and wasn't actually (also) surveillance equipment.
Strange paragraphs like
> Cryptocurrency is a computer intensive process, running trillions of formulas every second, and generally requiring the use of supercomputers. Having one next to a military base that's owned by an adversary is problematic.
appear to be entirely an invention of this article. This is, of course, not the issue with having farms of adversary controlled electronics next to an air force base.