I as a newbie here also feel sad with bitcoin prices are down. What's more I've bought bitcoin prices at higher prices than now. After investing bitcoin the price went up in a few weeks and I continue to hold until now I see prices continue to decrease. But I stay be patient and sure the price will increase, this is the world of trading that can go down and up (unstable). It all depends on your beliefs. But I suggest if you want to invest bitcoin do it now because the price is low.