The sudden surge in bitcoin price could be attributed to the expected segwit of 25th October, 2017.
The segwit will give birth to Bitcoin gold (btg).
However, other factors like the approval of some companies in China to trade iCOs are also considered as influencing it's surge.
Above all, bitcoin is still proving to be the future currency and must be embraced by all.
Other influencing factors include : new reliable crypto investment plartform and strong USA feats.
It is expected that bitcoin will hit $12,000 in a few days to come. Grab the golden opportunity now.