Anyone know how or why certain exchanges only choose to carry certain coins? An exchange like coinbase only offers BTC, LTC and ETH. I don't even see the point of trading there.
The point of exchanges is not for a trading but for a exchanging. If you have a currency that coinbase have a pair and you need a currency that is also in that pair then you will use coin base. After you do the exchange you pull your coins to our personal wallet that no one can loot and use them to buy yourself stuff that you need on regular basic.