i read somewhere airgap can still be compromised? is this even thru. i would imagine if you removed all netqork cards and ir ports on old computermto create true airgap you would be safe? then anything you wanted to put on there would have to be usb then smelt the usb and never let it touch the network again...
seems secure to me outside of smelting the laptop itself after you make 1000's of btc addresses....