I'm not sure.. on coinmarketcap it says a $5 million trade volume daily. That's not a huge amount for some crypto-whales I'm sure.

I have personally witnessed markets being moved by single people before, it's kind of scary to see it happen and it really does not take all that much to make the price rise. 10 BTC here and there will do it many times over.

But it's probably easier financially if it's coordinated yes. Of course there's a lot of rumors that the 'top dog' bitcoin whales are coordinating their efforts anyway..