It might have been possible to manipulate the price in 2012, but there is really too much money involved in trading bitcoin now to be able to manipulate it. When you have small amounts "moving" the price it is really a consequence and the price would likely have moved in such direction with or without your trade
Right now bitcoin has had a $21,173,900 volume of trades today. Moving the price for any significant period of time would cost a fortune today.
Assuming that your figure is correct, you would probably need to throw at least seven figures (in excess of a million dollars) to potentially move the market in any meaningful amount. That is really just too much money to risk in order to make a few bucks