Corporations dig deeper: using bunkers to secure data (and their CEOs)
semafor.com
semafor.com
Isn’t the point of the blockchain that it is replicated by every miner and thus is very difficult to delete?
Also, if your enemy nukes all of your miners (at that point you may have bigger problems) they will control a majority of them and therefore your $45 million pizza box in a mine shaft will be simply outvoted.