There is this post by yeponlyone in the Bitcoin Discussion area I'd like to reply: https://forum.bitcoin.org/index.php?topic=18084.0
somebody should make a 'predictacoin' site where you can make you official predictions on market trends and it keeps track of your accuracy, if enough people use it then we are bound to have some people with a high 'prophet' rating.
I think this is a great idea. There is crowdpark.com where you can do social forecasting, which is also a great idea. Just signed up there and created a "bet" about the BTC price on August 1st.
They also have something they pay with/bet for (C$). Maybe somebody convince them to pay with BTC or somebody wants to code a crowdpark-like site based on bitcoin. Think that would help bitcoin a lot...