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.
Yes I also agree that to experience some loss ( minimal loss) is a good teacher to becoming a wise trader. But of course do not make it a habit. Any loss should be compensated by another trade to recover from such loss. You should develop a your own technique when you got familiarized with the trading. Learn to distinguish indicators for the price dump and pump like reading the graph. Everything is a cycle.
trading without loss is just an impossible thing. although you always benefit you must be ready to accept losses, if we are in the world of cryptocurrency we can often get a loss and we must think how to make a profit. that's normal and loss will give us an experience