If this is going to happen, it's certainly not going to be the Phoenixcoin lmfao. It's basically a Litecoin clone and its development seems mostly dead. The writer of the article seemed to have named this new world currency "phoenix" arbitrarily so it's not connected with the coin. Either way, it's a pretty interesting prediction, and it does seem like something somewhat similar to it was developed: the Euro.

But yeah, if we want to break worldwide barriers without ceding a sovereign country's ability to control their monetary supply and giving an international centralized body inordinate amounts of geopolitical capital, we can simply use Bitcoin alongside fiat. Bitcoin is the new world currency.