You could be right but it still seems to me that Bitcoin is a totally different animal. The real price is what one person is willing to accept to part with a bitcoin. Perhaps the futures market will influence the real Bitcoin owners but without any physical delivery component to the futures market, it is still just play money.
No, I'm not saying that the futures market will influence real bitcoin owners. It's just how trading and hedging in general works.
The futures and bitcoin spot will be linked due to arbitrage... although the level will be dependent on whether flows in and out the spot market can be done efficient. The most active/liquid product gets to be the most efficient and best reflects price in supply/demand. That means that if the underlying volume in futures is 10x that of the spot, it will provide more info about the 'correct' price according to supply/demand.
The fact that arbitrage is possible, will mean one leads the other and IMO that could be end up being BTC being arbitraged on the basis of the futures price... not the other way around.
It's a similar thing with ES futures vs SP500 spot index. Which leads which lags? IMO that's generally futures lead the spot, since the immediate size available in ES futures is bigger than available in the underlying stocks book. Sometimes this reverses, when for instance there is company or sector specific news and those stocks jump before the future... making the spot move before futures do.
Same can happen in BTC. If volume will mean a more efficient market in the futures, tighter b/a-spreads... if you just daytrade or short term hold you could prefer the futures. If there's a sudden demand or supply in the BTC spot, that would temporarily lead the futures. And especially on expiry, this will happen.

