"Over the years, America’s staying power has been regularly and
chronically underestimated—by condescending French and British
statesmen in the nineteenth century, by German, Japanese, and Soviet
militarists in the twentieth, and by homegrown prophets of doom today.
The critiques come and go. The object of their contempt never does."

As an Empire, yes. As a Nation (Republic), we will see. The ideals that serve as foundations to your country are powerful indeed. Ideas don't die so easily. It only takes courageous men and women to stand up to them, and so far the U.S. hasn't run out of those....yet.