The national debt which is what US is suffering from is where you print more money than you should by practically borrowing money from every single citizen creating inflation. Another way to look at it is the government spending more money than they actually have. This is a simplification but I hope you get the difference.
What's gonna happen depends on how dedollarisation goes. You see unlike other countries and other fiats, when US prints money and creates debt, they export that inflation to others. But as more countries dump more dollars, this inflation goes back to United States.
So a period of very high inflation and shrinking economy and even recession is on the horizon.