Before long hold any coins you should know the potential and whether there is a sense in it. Just have coins that are used on exchanges for trading, there are coins for storage and exchange. Different meaning of the coin.
true, see and know the information about the potential of the coin for the future, if it is good for the long term then hold the coin until the price rises high, and vice versa there is also a coin to trade that is very feasible for it because the current price is hard to guess and when this remains patient and resistant first