If it were trivial to find buyers, wouldn't that be a sign that they priced the debt too low? It should be just hard enough to find buyers that your lost sales are less than the extra price you are able to extract to the sales you make.
Only if you can hold the debt until someone is willing to pay the price you're asking to make it profitable.
Most banks don’t want to take the loss and legally they don’t have to book it until the asset is sold. So banks often get stuck with bad loans because selling at market price requires them to take a write down
Could it be tied to the current debt crisis USA is having?
This might play out just fine, or crash like the housing market.