Governments will try to enforce control over the currencies as a component of the integration as we saw with South Korea. I see exchange via BitCoin as the main vulnerability to crypto currently, that could give rise to a Supercoin by which the value of all other coins are determined and thereby rendered practically worthless.
Bitcoin is finite in supply and alt coin exchange demand is going to push prices through the roof as adoption increases.
Btw, I nominated you take part in the 7 Day Black and White Photo Challenge in my last post :)