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.
Yeah, its impossible but having a technic with trading will less your profit loss. Some of succesful traders base on the news of the coin. When good news comes from a coin the traders are raising their buy orders then just wait for a more than 5% profit in that coin. Some traders lose because they expect too much because the movement of cryptomarket is so volatile it will burn your profit in every second.