You also cant trade a coin in pair when it's not worth it.  It's like going to the store and having to pay a $1 for something that costs 10c because the store owner doesn't have change.  Also to be fair you can't really say that that being listed with LTC instead of BTC was the cause that dropped the value, that trading pair swap is common for a lot of coins, it's more of an effect of the value dropping not it's cause.  The crash you see happen is the coin stabilizing after being forced paired with BTC for too long out of it's actual value range.  Unless something big sweeps in to supported that inflated value the bubble bursts.  Zeit also had loads of other worries like the tomfoolery over at cryptorush.