in this period i dont think to sell my bitcoins because its price will rise .
If you bought it at cheap price, why not sell it today and profit earlier,, but if you are into longterm, then just keep it and wait til when you want to sell it..

Right! It depends on when you got in, the volume of coins you wanna buy/have bought and what your strategy is.
Everybody has to find out for himself what his plan is or what he/she prefers.