I’ve heard this fearmongering for DECADES!
It took the Soviet Union 70 years to collapse and they had a terrible, centrally planned economy. The US’s debt will eventually come back to haunt this country, but exactly when and how sever it will be are unknowns.
There is a term in economics called the ‘sudden stop’ and I expect this will eventually happen to the US.
https://www.investopedia.com/terms/s/sudden-stop.asp
JoMa