I would give 10 years instead of 5. IMO approximately in this time it will be no longer possible to increase debt ceiling and US will have to do something with the problem. There are two obvious solutions - cutting the welfare or implementation of VAT taxes. But it seems like none of this gonna happen because this will be a political suicide.

On the other hand we got stories with russian sanctions and chinese trade war. Countries with unclear relationships with the US will significantly decrease their USD reserves (I guess their reserves will have the same structure as their external trade) and it is not clear what US gonna do with released volumes.

But on the other hand, the US is the country where the entire world's economic science is concentrated. So if any solution is found, there's a high chance it's going to take place in the US.