We park military in the Middle East mostly due to religious extremist and terrorism risk. Bitcoin does not change that. But even if we park military in the US mostly due to oil, bitcoin doesn't change that either! Bitcoin increases our need for energy.
Tall tales, unless your argument revolves around keeping the entire region so poor and fucked over that they can't afford plane tickets or other ways to go attack the US.
Or you're talking about protecting something other than the US and its citizens, in which case...
Profits incentivized miners to invest in specialized devices. If Bitcoin's price stood still, hash power would eventually find equilibrium, and no new resources would be invested. But if price keeps going up, of course people chase more coin.
So I looked it up. How much oil does the US import? It is a net exporter. This article takes a view of the world as it might have been in 2005, but it isn't today.
Even if you buy the idea that the petrodollar is something America does encourage (using strategic alliances with oil producing countries to keep the dollar the reserve currency in order to use it for diplomatic reasons) that has nothing to do with the carbon cost of the dollar. It's to do with the carbon cost of the US trying to project international power.
It's these sort of articles that make me even more suspicious of Bitcoin ownership.