I would have better bought a textbook on the Russian language

I bought 200,000 MYX for 15 000$ (1 MYX for 0.075 $ ) on June 18. The current price is somewhere around 16.30 - 16.40 $ for 1 MYX, should I sell or hold on until the end of the year, maybe another 50-60 $ the price will rise even more?!… What do you think???