Monarch aircraft fleet are not assets as they are all leased and therefore they will be returned to their lessors, Monarch don't own any slots so no assets there, eventually those slots will just be distributed to other airlines, routes are not assets either as any airline is able to pick them up themselves at no extra cost.
What assets did Monarch actually have for the creditors to sell off?
Although Monarch crew were obviously assets to the company they are not a financial asset which can be sold on by the creditors, as individuals they find themselves unemployed.
This whole saga is so sad and could and should off have been dealt with far sooner.