Yes, shorting is profitable if you see a downtrend in the coin. As many members mentioned, it is stressful and not advisable to trade margin. I find it better to buy the coins and wait for the price to rise.
Yes shorting is profitable only if you are easy with taking risk. In this case, if you are newcomer then even it is okay to do short trading for getting experience. But still you must have knowledge of the trending situations.
Buy, it and then sell it in short time after a little rise and then again buy it in suitable time. It is okay but you must not comprise on risk then.