I think there are enough people that strongly believe Bitcoin and a few others are worth investing in.  So the price will eventually stabilize and then go back up if this is true.  If too many lose trust then it could continue to go down.  We have to have enough buyers to make it go up.  Personally I am holding long term and think the markets will go up soon. (In the next couple of months.)

RELAX, don't watch the markets every second.  Check it once or twice a day.