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 ?
Who knows what will happen with the prices
Altcoins are sustainable and can grow but nothing is up to now because market is dumping
If i were you?dont expect anything for now because the volatility of cryptocurrency are indeed this time