How is pump-and-dump even possible in an ecosystem such as Bitcoin?
Pumping is easy, sure, just load heaps of cash into all exchanges, buy every single wall that is put up, price explodes. But how is the pump-and-dumper supposed to get her money out when she decides to dump? All exchanges have a hard limit on how much cash they can divulge on each given day.
This is an impossible scenario with Bitcoin, as it is today.
That is NOT how the "pump" part of pump-and-dump works. You get gullible people to put their money into the asset.That way you still sell at a win well into the collapse.
They include this bugger:
https://data.mtgox.com/api/1/BTCUSD/trades?since=13654550186...
In fact, transaction id 1365379200 converted 1000 BTC into USD, in a single massive sell order worth $180,000 USD.
Your baseline assumption is wrong. Someone cashed out on $180,000 USD during this event in a single transaction.
300 accounts would give you access to $3 Million USD. And Mt. Gox has a simple API that you could coordinate all of your accounts together.