The crypto scene needs a more direct and established link to real world products and services. Only then will a/those coin(s) become firmly rooted and have price stability akin to fiat currency.
I think the problem is indeed that a lot of 'companies' behind altcoins stay in the development/project fase. And I think it's not that strange that the step from project to real world use of the particular altcoin is a big and difficult one. I mean, why would a big multi billion dollar corporation choose to work with a small altcoin company? They have their own massive IT departments, if they want to use it they can just develop it themselves easily with all the available open source material. I think in this way the altcoins that are really designed as a form of payment at the moment have the highest sustainability.
So you are asking for a soft form of regulation and the same break mechanism what you can have stock markets
. BTW those big dumps are used to be panic selling noobs and I don't see why anyone should stop them being dumb. That's their natural right.
I know regulation like this is against the open market idea of bitcoin. However I think the current exchanges especially the ones with a low volume of certain coins show a lack of capability to offer a markt conform price for their coins (the price differences between exchanges). Combined with the problems with flash crashes and completely shutting down (coinbase whenever ETH is low).
I think for a start altcoin developers should start focussing on making a whole product instead of a plan for which they still need a big load of luck to attract
potential investors/companies who want to work with them.