Agreed, but not all governments have the same resources or motivations. I would assume the US gov would attack anything, but the gov of some European country probably wouldn't, since their power and legitimacy aren't dependent on exporting debt/inflation via a reserve currency. Also it might be possible to estimate the likelihood of an attack on any crypto or btc by starting with the number or potential attackers, either private or public. Anyways, not super important - I was just curious.