I have seen some old coin like NXT and ZCoin dumped hard now and there are no others sign the price will be back to the top price, the price was going down 1/20 from the highest, and this is not only because the crypto market crash but also too many competition on the market. There are new coin listed on the market mostly everyday , and we need more new money to increase the demand.
Increasing the demand is not the main thing. Not only NXT OR ZCoin but even ICONOMI, TIME, VDICE, this are some projects which got ICO investment fully but even then their price is nearly 90% down. So investing in altcion for long term is very risky.