People who make a road cant be the reason for it to exist.   Coins that duplicate each other are going converge most likely.

This is like the house price 'problem'  If the price gets cheaper is it bad or not, for people who use houses it ultimately is a good thing to have a useful product available cheaper.   Its tough luck if banks wanted it higher, they are not the users. 
So I see the coins as either a useful product or not, if it does get cheaper for some reason then in a healthy market this is a good thing at least for some people who wanted to use it not profit from speculating or anything else, actual users matter most.
  Capitalism is based off mutual benefit, its politics which tries to continually inflate prices and introduce bias to one partys advantage.  So you have cryptsy enabling sales more easily, really that utility should be positive because theres always two sides to any sale - if there isnt that coin is DOA