bitcoin does not needs exact news to be higher again. its just manipulation of big buyer.
more people buying then selling is the certain reason why bitcoin reach that price so fast.
The price of bitcoin is pure speculative but there are other factors for big investors to invest in it ,first and foremost the news of a derivative market coming up will encourage investors to spend their money in bitcoin and those who follow the market does know how big the market would be in the future and these are the factors that encourage people to invest rather than riding the bull blindly.
No one can says what will happen in the future, maybe for now bitcoin value are incredibly increasing rapidly but we just need also to looked the other factors. We just need to see the many angle we don't need to be one sided.
Yes bitcoin are climbing quickly and there price are close to $8.6k but I think before end of this year their value are fall down into $7000 to $7500 hopefully that this is not happen.