In trading altcoins, we must calculate the profit and loss including in this case transaction costs. Each altcoin has a different transaction fee when we withdraw from one wallet to another, a trader will choose the altcoin that has the lowest transaction fees because it saves expenses. In my opinion the lowest cost altcoin is Litecoin, I have used Litecoin as a transaction when I wanted to convert it to fiat. If you want the lowest transaction fees, I think LTC is perfect for small traders like us.