could it be a pool as almost half have been sent out

and its a lot of hash/processing power to use
I am 99.99% sure it is someone with a GPU miner, if it was a pool they would not be sitting on so much coins.
Balance: 30700.169 PPL
Transactions in: 560
Received: 56000.248 PPL
Transactions out: 253
Sent: 25300.079 PPL
He is probably trying to thin out the amount, If he is reading this, I think you have killed this coin and shot yourself in the foot ha ha.