Bitcoin could definitely triumph over the currency wars itself, but it's greatest defining factor could also become its biggest downfall. I'm talking about its intangibility and hoe it heavily depends in energy to exist. Most would agree that without the internet, bitcoin wouldn't have the higher ground. So nations could basically initiate a world war that could heavily impede technologixal advancement, with the inclusion of the internet to destabilize its value and put the power scepter back to fiat, as easy as that.
The internet is the most influential invention of the 20th century and has and will completely define the 21st Century. There is no way in hell that the world's superpowers would purposely hinder the internet and technological advancement to disrupt bitcoin. The entire fiat system runs off the internet so it would be the technological equivalent of kneecapping one's self. Central Banks are moving toward central bank digital currency and the internet is fundamental to their administration so this sentiment is really off base.