50 BTC worth.
EDIT: Here's what I don't understand... How does he know it was his former employee?
I lost a bit more than 560,000 DGC due to an ex-employee copying the wallet file and later key logging the password from the work computer. Most if not all of it was already dumped (those are the massive sells you noticed yesterday).
This will not affect anything when it comes to DGC's development. I'm probably more motivated if anything.
How does he know said ex-employee made a copy of the wallet file, and keylogged the password? How does he know it wasn't someone outside who managed to hack his network or something?
Why do want want to attack this with logic and reasoning?
~BCX~
Here's motive, too: He wanted money. He could sell the coins himself, pocket the 50 BTC, but then faith would be lost in the currency if the founder is selling a bunch of it, and the rest of his DGC holdings would be worthless. So he claims it was stolen, sold off in "those massive sells" yesterday, so that he can sell a large amount of his own coins without raising anyone's suspicions.
To me, his facts seem too definite. He knows more, without question, than he should be able to. On top of what I've already mentioned, somehow he knows that the coins sold on the exchange yesterday were the same ones that were "stolen". Sure, one might make a reasonable conclusion to that effect, but with certainty? He seems certain. Why?
EDIT: Also, he mentions nothing about the ex-employee as far as prosecution or recovery. It's like $30k was taken from him and he just doesn't care. Who doesn't care about $30k? Also, who doesn't change passwords after an employee who had access to the machine storing all the money leaves? That would be the first thing I would do, and I'm not even a very security-conscious person!