Trading futures is akin to gambling and the whales know this, they are basically like the high rollers in casinos but the difference is that with casinos, all the power lies with the casino owners and the gambers knows this, but with bitcoin futures trading, it's a bit different because manipulations are being done all the time and it wouldn't cost them much to start spreading false rumours that could take the market in any direction they want thereby stacking the odds in their favour, I believe that if bitcoin futures trading wasn't a thing, then we would see a much more stable growth for bitcoin free of most of the manipulations that occur daily.
Exactly.
Any serious cryptocurrency should by now be considering banning any exchange that is part of price manipulations. Such decision and similar ones should be done democratically, by the affected communities (of thousands/millions of users) and not just a few.
Price movements should be based on real fundamentals and not manipulations.
By the way, price manipulation is done in many ways, and not just on such exchanges. If they are all stopped/prevented, we will probably have only few cryptocoins moving up as they should.