So, the latest buzzword in Bitcoin is manipulation. Has anyone worked out how much money and bitcoins is needed to trigger
a change in the buy and sell behaviour of traders on exchanges? I know the Silkroad Auction did not make a significant impact
on the price and the same goes for the odd coins that were sold from the MtGox hoard. How many coins can individuals dump
on exchanges to push the price down like this? How long can they sustain such an action to sabotage the price? These are
questions that are very relative at the moment.

If the SEC says that the high price increase of last year was manipulation, then they must bring the proof. Let's do our own
informal assessment of the situation and determine what would be needed to cause that kind of a spike in the price.

If you want to influence the price or to change the either it will be dumping or pumping then it will be depending on the coin, the prices of bitcoins today is dumping because there are a lot of people who prefer to sell their coins on the market more than investing.