I've been holding some alts from trading and bounty campaign and it seems that most of them especially from the bounty campaign are down atleast 100% and more, so sad to see those amounts but i'm optimistic that it will be reduced this month 
Man, your altcoins cannot be down 100% because if that were to be true that will mean that your altcoins will have no value that they have crashed completely and now that you are holding useless coins, however it is very likely that your altcoins are losing a great amount of money but if those coins are any good then you need to keep holding but if the coins are not good at all then it could be a good idea to grab any money you can.