just buy bitcoin my friend, this coin will bring a good profit for long term investment or if you had a good skill on trading activity this coin also good my friend, about altcoin, for me only ethereum is the best for long term or trading 
not necessary in the long run. Bitcoin investment is just enough to wait for a pump that can come at any time. as happened this month, bitcoin pumps even in a few hours, and it's very high. if we are lucky we can profit from such a moment.