Although there are a few countries who uses bitcoins and other cryptocurrencies now, I cannot help but wonder if the world is truly ready for this digital currency? It will certainly be hard to replace all currencies in the world but it could happen in a decade or so, perhaps even less? Still the question is, is the world ready? I think if this happens it might be one of the biggest changes that will happen worldwide.
Yes if most fiat currencies including major currencies from powerful countries gets replaced by Bitcoin or any other cryptocurrency it will be the biggest change in our history and that is why it is very rare and difficult to happen but with the time it can happen but not from one night. So if your question is is the world ready for cryptocurrencies my answer is yes the world is ready but in order to be useful in the world it might take many years from now