Bitcoin has it's lowest price of all time, this is the right time to buy bitcoin because bitcoin market is down and in the end of 2018 bitcoin will touch 20k$ above again....!!
The current problem is that why the bitcoin price is still in the same range of below $10k from more than 6 months and there is no solution to this problem as there have been many a times when bitcoin tried to go above $10k but the investors hesitated in investing above $10k so the price fell again.