Some very good coins out there have lost 95% of their value already is it possible to see more down fall? I'm throwing this to those that are present in last bear market, marketcap and volume is over millions of dollars and price is 95% down? 
:I downfall still possible? For example Metahero.
First of all we should know about the factor which cause downfall for any Altcoin. If any of these causes are found, then the altcoin goes down. Most common Factor are: :I downfall still possible? For example Metahero.Btc Correction:
whenever BTC Price down we have seen correction in Altcoins with double speed. Now it will be seen whether there are chances of Bitcoin to go up or down. If there is some news that Bitcoin price can go down, then of course, altcoin price will also go down even if it's already down 95%.
Token Unlocked
Some Tokens are totally new and still have some tokens unlocked And every month their tokens are unlocked. If this is the case, even if the market is good, the chances of the price of this token going down are high.
Fake pump:
Some tokens have a very limited supply. Big whales take advantage of this and they pump coin with fake way and when other investors buy they sell all theirs token which cause price downfall.
Bad News:
Some times it happens that a coin gets bad news about them in the market which causes the price of that token to go down. Previously we have seen this with Tornodo Cash, GMT, Gala, Axs, Slp and Solona .
There are some more factors also like Delist from Cex, trend over. now we can say that even if project is big and already down but because if these factors there is still possible to go further down and we should be careful when buying.