If the market can lose a very large percentage of capitalization in a few days, it is quite possible to get 50 thousand/BTC by the end of the year, although this is unlikely
50k US dollar is a huge value and it will take time to give us this much value so for now we have to expect value lower than 50k around 30k dollar can be possible by the end of this year or may be in the beginning of 2019 as said by experts.
Better to focus on getting coins in large quantity in this favorable market of Bitcoin you can get it easily as we know that Bitcoin will enrich you with its huge profit in your future only if you start buying in low market.