Hi!

So i been collecting all kinds of different cryptocurrencies/tokens and i would like to sell or exhange them to another cryptocurrencies/tokens but not sure where. I heard that GDAX is good place if you have Bitcoin, ethereum or litecoins but where i should sell/exchange my other cryptocurrencies/tokens. So far i have exchanged some coins in coinpot.co where the exchange is free but sometimes i feel like i lose some coins because the coin value there is not always up to date.