You can lose profit sending trading and withdrawing if you are trading a small amount I have $50 worth of Ferum or FRM it will take $6 to send the whole amount to Bilaxy and after you trade it to Eth and wants to withdraw it you will have to spend $12 to withdraw your Eth,
now that's $18 gas fees for your $50, my only option is to trade it to other altcoins like DGB or Litecoin which offer $4 to $5 fee you still going to lose $11, that's over 20%.
I feel the transaction fee for now is very large. This is obviously very detrimental to small investors because they have minimal assets and will be used up to pay fees. I still hope that the fee will be able to go down in the future so that it can provide low fees and not bother small investors