The coins have been getting stolen and dumped over the span of an entire 3 years. It's not like theyre all waiting in a big pile to suddenly be dumped now.
True, fraudsters are rather bad at saving... And they got the thing going for quite a long time...
I do remember them transferring all their coins to another address at some point, so we know they had at least X amount of coins at that time
do you think the shit started back when they stopped doing those? 
