If they actually cash out their 80% premine, does the coin stop being a con? Because it's the pre-mine that makes the coin a con. And dumps are what legitimate investors are afraid of, right? If they cash out the premine, it would transform the coin into a fairly distributed coin. Those devs may even have an incentive to stick around as devs for additional opportunities that devs get based on their status as experts. Could there be a bizarro future where bytecoin becomes a legitimate coin? LOL.
That assumes that reputation as a scammer means nothing. I'd personally not want to invest in a coin where the developers were known scammers, but to each his own.
However, in the case where:
1. It were known that the original scammers had cashed out, and that the buyers were actually widely distributed and not just another (or somehow the same) small group of scammers; and
2. The original developers abandoned the project and someone else took over.
Then sure it could become a totally legitimate project.
The odds of this actually happening are between slim and none.
In a sense, though this is one obtuse way to describe Monero. The original developers cashed out at effectively zero (or whatever they got dumping BCN in the first couple of months) and a new group of unrelated developers took over.