Your kind has been saying that for 50+ years. When is it going to happen?
Within your lifetime.
There is not a single indicator that is in the nation's favor. Unpayable federal debt, unfunded pension funds, decaying infrastructure, disappearing manufacturing jobs, immigration, whites becoming a minority, China getting militarily stronger, the US getting weaker, Muslims overrunning Europe, etc.
Arnold Toynbee, a British historian and philosopher, said this: “An autopsy of history would show that all great nations commit suicide.” Consistently with this prophesy, yours is already irreversibly past the point where the end is imminent.
If you are lucky, after the collapse, the new system will be autocratic - if not dictatorial - and, like in China and Russia, sustainable and on the road to recovery, but not before the government debt is repudiated, and your savings wiped out by inflation or confiscation when a future Commander-in-Chief decides to declare a national emergency to legally grab your money. The current one already told you that he has a phone and a pen, and that he can do whatever he wants because, to him - and the morons who elected him twice - he is king.
With less luck, the U.S. will become what the Latino hordes are bringing with them - a crime-ridden, corrupt, one-party narco-state, with the whites as a vanishing minority. While invading your country, they already get all the assistance from your worst enemy - your government. To add an insult to the injury - at your expense.