In my prediction i think every price altcoin is still down because fail and scam project.A good project lock their token to save a fall price. But its not give effect to make their price is up because too little buyer in market.
Will the altcoin raise again in middle 2019 ?
I don't think that's true at all. Yes some coins are scams or pointless money-grabbing projects that don't even need to be crypto.
But there are plenty of alts that are real projects, with a genuine use-case, a solid team and roadmap, etc.
It's just not true that all alts are scams.