It is so impossible to trade without any single loss. But the thing is we can compensate every loss thru average down. So do not trade the whole money 100%. Always trade in portion. One more thing do not trade using margin if you dont know how to manage it.
you can conduct Technical Analysis (TA) for you to be able to somewhat determine the cloud of trend and the movement of the candle graph in a particular coin. In that manner you can atleast know or you are guided to know the peak of its value or the dip of its losses.