Again, Cantillion effect (just like Triffin's Dilemna) exposes that a world reserve currency is unsustainable. The answer is not to replace one world reserve currency with another, but rather to over haul the entire system (which is what is going on) so that there is no more world reserve currencies, and their evil effects on the world.

Lets finish debating the Triffin's dilemna first before delving deeper into this, if you still feel this needs to be delved into deeper.