i believe it'[s temporary, 3 yrs ago prices went down like 80%, most people were panic including myself.. Sold 0.7 btc at a very cheap price that day and i still regret it till now
i would invest cause if u look at its flux it seems to always go down in the winter time sounds odd but since i first started witch wasnt 2 long ago it was like $5000 so if it hits like $2000 buy some even just 1 cause like the stalk market plus its very populer it will definently come back u so buy and hold on cause like the south bitcoin will rise again lol