I don't think we really can change the growth of the altcoin "industry", per the nature of a cryptocurrency. It's so decentralized, one may be created and marketed at any time. And, there are so many niches to which a coin can be applied (not to mention how easy it is to build a coin) that there's no way of easily inhibiting the development of pointless altcoins, however spammy they may be.

And upon what basis are you making such claims?

Does anybody know where there's a BTC-based securities market that supports short-selling?
For that matter, are there any that support actual securities and not just primitive bonds, binaries, and shares?