Historically prices of futures never influenced the price of the underlying asset much.

Also, keep in mind that a future is originally meant for commodities like e.g. grain or wood. These contracts are passed on like hot potatoes, because if the contract expires, you literally get your commodity delivered in your front yard. Most people don't want that but.... because bitcoin is digital and it would fit nicely in any backyard worldwide with virtually no transport or storage cost, it is very easy to  take delivery after the future has ended.  My guess is that shorters will be terribly burned, soon.