Actually, I would be very glad if there were no individuals with that many coins to manipulate the market to such a degree. Do you personally think this is the case? I mean, are there no more so called "whales" already?
I am sure there are plenty of whales actively trading the market, but we don't see them be a whale because they are trying to cover that as much as they can. On top of that, whales are competing with other whales, so it's not that they have any sort of ability to instantly pump or dump the market to whatever levels they think the price should be at. I think the term manipulation is a bit overexaggerated.
The main problem is the lack of liquidity. When stop loss orders get triggered because of people's panic selling, and there is no liquidity to offer any sort of resistance, the price dumps hard. We have seen that with how the price went down $1500 in just 24 hours.