Imo a long time, the state will maintain hegemony and a false sense of authority far beyond what would be considered state collapse in the eyes of its citizens living inside it, it would maintain political power, and military power, and collect taxes decades past even the illusion of providing any justification for its existence... It will continue to attempt to sanction other countries well into what could be considered a collapse, and use its own instability and place within the world's economy as political leverage.

There is no exit plan for empire.

it will be among the last to fall

Not soon enough.

I think it is more likely to merge with other countries than implode/dissolve.