Please, be concise. Bitcoin futures would exist just for the same reasons that currency futures and commodity futures exist. The primary aim of futures is hedging against price volatility whether it is currency or commodity. And yes, there are even futures for commodities that don't even exist yet (consider crops)...
Can you explain to me what would be the advantage of buying a bitcoin futures contract instead of just buying bitcoins at spot?
If you take time to find out why people buy futures in the first place at all (and this is not for speculation, to begin with), this question will be a trifle for you. People buy currency futures since they don't need currency right now, but in the future (when they actually need it), the price may change disadvantageously... I guess you just don't know that the futures price is not the same as the price it allows (gives a right) to sell or buy the underlying currency (commodity) at...
