Bitcoin prices have been in a free fall and dropped to a low of $5,860 a week ago.
It meant it dipped below $6k for the very first time since October 2017. Cumulatively, BTC has lost 70% of its value in 2018 and the peak of $20k on December 17 is just but a stat now.
Fluctuations in any currency, both traditional and crypto, have been and always will be. No one can tell you exactly when the growth or collapse of a currency will occur. The financial world is unstable and dynamic, but I believe in the prospects of bitcoin.