In my comment reply to @bachuslib, I summarized the logic of my blog.
The point is that coming global economic collapse (and probably international war as well) will end up being politically blamed on the strong dollar short squeeze that should accelerate next year with the collapse of the Euro.
That may enable the political will to remove the reserve currency status from the dollar and place it with a power sharing agreement among nations with a world institution such as the World Bank, BIS, and/or IMF. That would not require the nations to relinquish their national currencies and central banks (at least not immediately although another clusterfuck of collapse would ensue some decades later and all nations would become Greece-like debt slaves to the world central bank).
Additionally it appears as though Bitcoin was planted by the elite as a way to force the nations to support a world government so that there can be globally coordinated regulation of cryptocurrency in order to rescue fiat so that the people can continue to get the debt-funded governance they demand.
having a currancy u can use everywhere is pretty mutch a fairytail
Nations can complain all they want about Bitcoin being criminal, but no grouping of nations other than all nations can stop cryptocurrency. I explained that in more detail in the last section of my blog and subsequent comments. So I disagree with you, except that I agree it would not entirely replace fiats overnight. A cryptocurrency is likely to excel at things fiat currencies can not do, such as borderless global transactions for example in a global version of the Farmville game where everyone in the world is able to buy in game upgrades without the requirement to possess a credit card.
except u know of a way to destroy the oildollar system what is here today.
Armstrong argues that the petrodollar illusion is an outdated exaggeration and apparently Saudi Arabia admits it.