The fact that the CME will issue a future contract on BTC is a highly positive signal. It demonstrates that bitcoin is a trustworthy financial underlying, with enough liquidity and stability to be eligible for a Future contract.

It doesn't mean that the price will go up though: the value of bitcoin keeps depending on supply and demand; the price of the contract will follow its underlying. I would say that it might reduce the volatility of the currency since many investors will prefer to play on the future i/o the currency itself.