in my opinion, the market will begin to improve in early 2019, and the bull market will start from mid 2019. and I predict that bitcoin prices can reach $ 25k by the end of the year.
We don't need to wait next year. If we want to see bitcoin price up more than 20,000 dollars we need to work on that. But I think in the yeat 2019 bitcoin will be more better and price continue to increase on that year because many investor again will invest to bitcoin.
The overall bitcoin adaption rate is good. People are showing faith in bitcoin and they are trying to use it in the real form of currency for the sale and purchase of goods. Many institutions are adopting it and soon it will spread more. In this context, it does not matter when the next bull run start. It may be by end of this year or next year.