I prefer you only to buy bitcoins and keep them  because I am sure that they will grow and everybody who keep bitcoins will make a really good profit and some  persons will become rich because of that and other will just have more money but everybody is in winning position.I also think that it is better to keep bitcoin and give them access to grow because Donald Trump is American president right now and I think that he will bring good laws for cryptocurrency like a bitcoin.I  mean because of that laws bitcoin will grow but I am not sure if Donald Trump will do that but he is rich guy which will know how market works so I am sure that my predicition is correct.You can also trade with altcoins to get more profit.There are also cryptocurrencies in coincapmarket and you can see which have biggest growing I prefer buy fastest growing currency and then sell for more money later to make a nice profit.