Found. As if they existed to begin with. They can ‘find’ all that was looted from them with the stroke of a key. People gave real currency to buy into this. It doesn’t make it worth anything at all. Just means someone thought it was.
As for "looting", it's seems very likely that someone transacted some (or most) of the still-missing bitcoins from Mt Gox to other parties. It is possible to trace those transactions to others in the chain, but there are mixer sites that will take stolen coins and honestly obtained coins (they don't know the difference) and produce new coins to give back to the contributing parties (for a fee of course). So stolen money can be laundered to some extent.
As for the value of bitcoins, they remain in demand throughout the media blitz against them, so it looks like they will keep long term value as they shrug off each incident.