.....Remember WE are the price that any Bitcoin derivative is following. It will legitimize the markets greatly.
Be careful what you wish for.
The relationship between derivatives and the "underlying asset" is complex but, although it might seem counter intuitive, derivatives can definitely affect the volatility and price of the "real" market they are supposed to be tracking.
Involvement with the Derivatives Industry will mean they will demand minimum standards for bitcoin's exchange infrastructure.
They will want to make sure that if anybody is manipulating prices, it's them.
This is a Dance with the Devil imo. Remember even Warren Buffet, everyone's favorite, called Derivatives "financial weapons of mass destruction".