No It's no good at all and I wonder why exchanges accepts all those dump coins, they will never be anything like bitcoin. I'm Ok with Litecoin and Bitcoin but only 2 and not 1000's alts which are just for pumping money from other ..
Exchanges typically have nothing to lose other than database management by hosting all kinds of alt-trash. Since they take a 0.2% cut typically it's free passive money for them as long as the wallet is secure. They can dump the alt-trash coins whenever they want for BTC in their own trading systems. Some exchanges promote every single coin possible, some just stick to the older ones.