Well, at some point the price will have gone so low that the underlying economy may take a hit that is too big to maybe ever recover from it. At some point too many people will have lost hope and abandon Bitcoin for good. We're not at this point yet, but if it goes into the double digits, things might get pretty dangerous rather quickly! Let's hope that it doesn't ever comes that far!
from this point the price will surely go up. it still might dip below $200 but with the halving in sight bitcoin looks very solid as investment. what happens after that comes later.