Why not to do both? it is much better than one , and more profitable ..
Of course not all of them doesn't know if how to trade, as well as the situation of the market now too difficult to get huge profits. Yes it's better to do both but make sure that you know how to handle it, for now the best choice is hold the coins that having a potential.
to get a much safer situation it would be more worthwhile to choose hold. because market conditions will be more calm the even increasing rapidly with many holding coins. so holding an option to boost the progress of Cryptocurrency.