Considering how United States economy has been a Ponzi scheme for a very long time, there is no doubt that it will collapse at some point and there are a lot of "info" a bout it everywhere you look. The thing is, people don't want to accept ugly truths and prefer living in denial. Additionally it is not possible to predict "when" that collapse will occur, "how big" will that collapse be, and "what" happens next.

Take the 2008 collapse.
It was impossible to predict "when" it happened. Many people were warning for years before it happened and yet the corrupt structure were being kept alive artificially and by more fraud.
It was impossible to predict "how bit" that collapse would be, we now know though.
Most importantly we couldn't predict the next step. You see, the Ponzi scheme didn't die, it just got bigger to survive that  collapse and postpone the catastrophe and that scam has continued to this day.

The problem is the nonstop printing of dollar out of thin air while keeping its value up artificially. Otherwise they'd just increase the debt ceiling again and default is averted.

As for war, that too costs a lot of money. Money US regime no longer has. Specially in today's world where "fighting cheap" wins you wars not "fighting big with a lot of money".

Take the ongoing war against a prison called Gaza. The entire NATO is helping the genocide with hundreds of billions of dollars and over that past 4-5 months their only achievement they had was killing innocent civilians while the damage on the armed forces of Gaza has been so minimal that it is negligible!!!
Why? Because a $6-$7 million tank can be blown up with a cigarette lighter that's worth like 5 bucks or a Yasin anti-tank missile worth 100 bucks. Or a $30 million US stealth aircraft can be shot down like a piece of cake with a missile that costs a grand.