im looking information on internet but i cant find nothig about why the BTC it's going up so fast to 8.6K.
CME group, an American financial market company operating a options and futures exchange with $3.47 billion revenue, has announced that they will be launching a bitcoin futures market before 2018.
https://www.cnbc.com/2017/10/31/cme-plans-to-launch-bitcoin-futures-by-year-end.htmlthe market is seemingly pretty excited about this. additionally it is a good news that has filled the media and consequently brings in more investors. hence price is rising...
ps. as DaMut also pointed out this rise you are talking about is small (6%). this kind of rise is daily fluctuations for bitcoin not a rise.