The current scenario is really downward so no one is accepting the 50k USD in end of the year.
May be some unexpectable positive news are comes in future it will reach 50k USD. But surely it is impossible in this year.
It is difficult to reach this level during this period as everyone is in the bear market and almost all of the coins are in very low prices recently. I think we should wait in 2019 for this price to happen because this year is not good for long term investment and everyone should have confidence in Cryptocurrency.