I can have small amounts of Bitcoins and USD on all the exchanges I care to operate on.
If I was heavily loaded with BTC and USD, I could have humongous amounts of both on all the exchanges I care to operate on.
Whilst most on here don't see it this way. To an impartial observer, the Bitcoin chart looks a horrible bet right now. It is a clear bear chart. If the present trend is anything to go by, we will not see $850 Bitcoin again for some time. Saving for someone having insider knowledge that the rest of us are not privvy to, right now is a terrible time to be making multi-million dollar investments. It was either the work of a rich idiot or idiot(s), or the work of some whale(s) already up to their eyeballs in Bitcoin who are stage managing the market for some purpose.
All signs point to a slide back beneath the $800 dollar mark only for a record breaking trade on the 5 minute candle to swoop in and totally rearrange the environment.
I have seen myself tip the barrel in times of very low volume with my own trades, never more than 30 BTC these days. I have also observed how other exchanges respond to the shift in price I cause on Bitstamp. It is fun to do and in low volume conditions, even I can shift momentum in my favour for albeit, a short period of time. Now someone with massive reserves of BTC and USD, has the power to bitch slap this market any which he pleases. Perhaps the wealth he needs to appropriate to achieve this even inconsequential to him?