Currently, diversification in cryptocurrency trading is a necessity for any trader, which is why I use Poloniex, Bittrex, Kraken, and Exmo simultaneously. Among all these platforms, Poloniex takes the lead, as here I can utilize the widest range of analytical tools and work with both major exchange pairs and lesser-known ones. The fees vary depending on the type of operation (maker/taker) and the trading volume for the month. A downside is that the platform only operates with cryptocurrencies; fiat money is not accepted here, so I have to turn to other exchanges to convert bitcoins to dollars. In the end, after making a profit, I withdraw funds to my bitcoin wallet and then deposit them into an exchange that supports fiat currencies. This turns out to be slightly more profitable than using exchangers.