Using both as the trading and the exchange and use it at the market places.
It is better to think for some good period of time before making any kind of final choice and that you should seek guidance from the experts too as they can guide you in a better way. If you are good at day trading, only then you should go for taking this step as day trading is quite a risky job to do. I will suggest you to go for holding of the coins as this will make you earn more money with lesser efforts.