yes, this is the time for us to invest in bitcoin rightnow, we don't know when will btc will rise again so this will be time for us to buy with a cheaper price, as long as we can have some bitcoin rightnow, we may have higher profit in the future if bitcoin suddenly rise.
It is really the time that those who are waiting for the price to dump for a bit is the perfect time now to buy more bitcoin or any other cryptocurrencices based on your capacity, so this is really a great opportunity to start the year, don't hesitate, doubt and panic, do what your life can change.
Honestly, due to some problem on bitcoin exchanges that refer to south korea which has 20% accounting in bitcoin exchanges and if this will totally ban in government of south korea, it will make another hard fork again like what happened after chinas ban on ICO. But I think bitcoin will recover again maybe by next month.