Few months back i purchased arround 15 to 16 btc when bitcoin price was 10000$ to 11000$ each btc but now arround 4000$ each btc .Just waiting for 11000$ for each btc than i should leave btc and i can see bitcoin have no future in this time.
Investment in any financial market is good but it should be given some time to grow, also only the amount should be invested which one can afford to lose, I hope you have not invested all your savings. Bitcoin will be back to your buying price of may be more but it should take some time, just wait patiently, your investment will grow by time, give it some time like 2-3 years.