It's hard to do the same scam again and again and find new suckers. 
Unless your scam is an industry, like homeopathy or essential oils.
I presume a legitimised version of sorts will turn up but there's no way regulators will allow what happened in 2017 again.
Or maybe they would allow new scams to emerge, because in the grand scheme of things crypto is insignificant. All these billion dollar marketcaps are imaginary, there might be very little actual money going into altcoins, so there's very little point in regulating it. So, if exchanges will become regulated and not allowed to list tokens without approval, scammers will move to smart contracts and DEX's.