ICO's wont end, it will only be regulated, and that is not a bad thing for cryptocurrencies, regulation will help prevent scam ico's take the investors money, since ico is necessary for a projects success regulation will also be a factor for its good development especially in legal terms.

The downside of regulation of token sales as securities, is they can’t actually become freely tradeable everywhere tokens legally, unless they are locked untradeable on the blockchain for 3 years.

No more get-rich-quick gains and scammy pumpy dumpy.