The clone coins will stop when nobody is prepared to buy them. Less and less people are buying them so I think they will eventually fizzle out.
Volume has steadily increased for non bitcoins over the last year, not gone down. Marketcap summation is a terrible indicator, but that has increased as well.
The number of users across exchanges has also risen somewhere to the tune of 20-30%, taken from numbers shared willingly by exchanges.
One thing is for certain, there's no shortage of people willing to buy them, and no shortage of people willing to create them.
So would you care to change your opinion? Or are we all just gonna keep hoping for the best?