Can anyone help me how to know if the bitcoin price will decrease?
and how to trade bitcoins and earn? 
Because i invest bitcoins in yobit.net but i didn't know how to properly trade bitcoins. No Bro Its Not Possible to Predict the Price of Bitcoin Because Bitcoin Price is Fluctuating and it changes Every Day So its not Possible.......
And Trading is Always Risky and If You Don't Know Properly About it then Don't Do it Now, Firstly Gain Some Knowledge about Trading and Them You can Start Doing Trading.....