Bitcoins and ethereum has the most grip in the market, this two coins are highest demand in the market and because of that, i believe that this coin will the only coin who can actually survive for a long term investment.
The top coin is bitcoins and eth comes later to it. Eth has been a good coin that comes after bitcoins. They are best altcoin and in altcoin family, they are performing better than any other coin. The point is, when you are thinking of some trading thing, you must be clear and crystal about how and what to with different coins. Accompany best coins and get maximum benefit.