keep your Neo in the wallet to earn gas. If you put your coins in the exchange you wont get any gas. Make sure when you send Neo to the wallet you send only Whole numbers. If you send 10.99 NEO to the wallet, you will only receive 10 neo and 0.99 Neo will be lost. if you need to send 10 neo from bittrex, make sure to send 10.1 so that 0.1 is fees and 10 neo is sent.