Now it is time to sell, because Bitcoin price now is quite high, more than 8000 USD, see here http://preev.com/. 
We can see that bitcoin prices are rising sharply in recent days and there are no signs of a decline. The bitcoin price is now above $ 10000, so we think it's a good time to buy Bitcoin. At the moment, the bitcoin price is $ 10120 and is still going strong, according to my analysis, the bitcoin price will keep rising in the coming days.