I think the BTC will never be worth as much as $ 50,000 because there are many reasons why the value of BTC will not be high anymore. In the first months of 2018, the value of the BTC has fallen sharply from 2017 and there is no sign that it will be as high as 2017. It would be reasonable if the price of the BTC was about $ 10,000 but never $ 50,000.