Die empty has already hit the nail on the head, this is not a direct attack on cryptocurrency for now, but they are considering the risk at stake in having a Chinese based crypto mining facility near their own sensitive military coverage, this should be seen as a request and not a threat or attack for evacuation, though the whole idea should have been seen that crypto mining mean nothing to harm their activities over there, but for privacy sake, things like this should be taken action upon because its an area that have already accommodated two countries in which shouldn't because of the US government sensitivity to their security covers in that zone.