The additional negative effect of futures is these greedy traders with huge leverage.
And if you know how the futures market work, like the short position or long position, 'short squeeze/long squeeze' is also affecting the price of Bitcoin, most of them are causing huge candle wicks on the chart.
But the futures market will stay I believe, it's already given, futures market already existing before on different markets.
correct greedy traders is the common reason as well why the situation of market sometimes very unpredictable wherein even they just doing shorting or long term.. If you use to make TA with the candles stick you can actually see that each of every candle has a scenario that happening everytime when market is active. For example tha candle grow higher and suddenly it turn into a little candle so that means those greedy people is dumping everytime the growth rate is increasing, therefore they are the common reason why crypto market is so volatile in my opinion.