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.
bad decision, you should have made a strategy and put an stop order,
Also doing a wider long term TA research would have been beneficial, because a lot of TA were telling that 10 k was not he bottom.