That's why people called cryptocurrencies are volatile for this reason. It's unpredictable, even the professional traders are often get fooled with the market movement and most of them suffered with lose.
Literally the best coins to invested on an exchange site are coins that got listed through voting because it shows that the coins has already gain community support and any coins that gain community support have the possibility to survive the crypto currency market.
That's wrong. Voting to list those coins on exchanges doesn't mean good, probably the voters are from bounty and it's not organic voter I would say so it's invalid to determine a good coin. Also, even though they won the voting you have probably seen that those coins also dead within a month which is really pain to see.