But then, is it fair?
Since the markets are largely unregulated, and the common man cannot compete with the billions of dollars that these people have, market can be manipulated.
What if they start dumping after a pump, where lot of ameteurs buy as a result of FOMO?
Esp. since the BTC markets are not regulated.
Downward pressure is a good thing to stop volatility, but this can cause massive crashes as a result of market manipulation.
Who regulates these people?
This is my concern as well, but if you think about it, the market really regulates itself. The more coins these people buy, the higher the value gets. It's not going to be easy to just buy millions or billions of dollars worth without taking on a significant amount of risk. A massive uptick in value thanks to them loading up could trigger people to start dumping, giving them massive losses. We have yet to see something like this happen, so it may be more difficult than people actually predict.
As for the short term effects of Bitcoin futures, I'm guessing a bull run. More demand means higher prices, but more day traders may also mean more volatility. We'll see. Either way, Bitcoin is here to stay and Bitcoin futures are not going to kill it.