If past is prologue. And I have no reason to believe our empire will end any differently than the dozens of others that collapsed in the past.
“While external threats like invasions certainly played a role in the fall of great empires, most historians agree that internal political-instability and economic issues were usually the primary factors that weakened empires from within, making them more vulnerable to external forces;
therefore, the answer is largely "internal politics."
Key points to consider:
Power struggles, corruption within the ruling class, and civil wars often eroded central authority, leaving an empire weak and unable to respond effectively to
external threats.
Example: The fall of the Western Roman Empire is often attributed to a combination of internal political turmoil, economic problems, and military weakness, which allowed barbarian tribes to successfully invade and dismantle the empire.”
So in the long run. We will crumble internally not from an external threat as is the usual concern of politicians. The political class has also used distraction as a way to humble and quiet the peasants.
Today they use division (racial, ethnic, economic class, and the newest, sexual orientation) instead of the Roman Circus.
But the results will be the same. Internal, self inflicted wounds will be the end of our empire. Not Russia. Not China, no one but ourselves.