First i'm not a native English speaker, so sorry for my bad English. But I will share my opinion and idea here and I like to see how other people think about this.
In the upcomming weeks future trading for the Bitcoin will be possible. December 18th CME Group, the largest derivates exchange in the world will launch bitcoin futures. And also the Chicago Board Option Exchange and BATS Global Market will open future trading on the 10th of december.
The bitcoin price is going up a lot lately also because of people speculating about big investors like banks that can buy Bitcoin. That's the wrong idea. Banks can buy the futures, but with futures you're not buying any bitcoin at all. Futures are financial contracts obligating the buyer to purschase a physical commodity or financial instrument at a predetermined future date and price. The futures may call for a physical delivery of the asset, but others are settled in cash like the bitcoin futures and thats in my opinion a big problem for the bitcoin. Because when futures are bought they won't buy an real bitcoin!
Now the big problem..
Why would new people or big investors buy bitcoins on unsafe exchanges or use wallets and risking to lose there bitcoin when they just can buy bitcoin futures? And think about all the institutions that already bought the bitcoin they maybe will sell it to buy safe futures. So a lot of potential bitcoin buyers will buy futures instead. But when you buy a future, you're not buying any bitcoin, so the trading volume on the bitcoin will go down instead of up. That makes the price of the actual bitcoin lower.
At the moment a lot of people thinking there will be a huge demand on bitcoin if the future trading become active, but actually it isn't, it's probably the opposite.
So the final thing to think about. The future market for gold is more than 10 times bigger than the real gold market.