So big whale.... A week ago I saw lisk whale had a 2k btc sell wall, now is maidsafe whale has 1200 btc wall, they can sell proportionally for more profit, this big sell wall will scare investors. Unless he is the pumper and dumper, nobody will buy his wall. Ridiculous rich whale.

Think about this:
Who in their right mind would trust an exchange like Polo with 1200 or 2000 BTC ?
Right, precisely nobody.
So the whale is Polo itself.
No other logical explanation.