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.
I think your opinion is completely correct. There is no investment of any kind, no risk, 100% safe. Any type of business that brings high profits comes with it very high risk. So I think you should allocate your capital appropriately so that in the event of a trade loss you will not lose all your possessions.