Well, who knows? The trajectory has been set in and it is downwards. After Nero and the year of the four emperors the Roman Empire still had ways to go. So, I would say also the US can potentially recover. On the other hand the saying 'it cannot possibly get worse than this' has also been disproven may times in history. In any case, I like to sum it all up by saying "The US is a superpower attempting to become a third world country".