Bitcoin drops the price because no one buys and sells it a lot.
The law in cryptocurrency trading is like that, many who buy mean the price goes up, if a lot of the selling means the price goes down.
This is some corner answer but understand that bitcoin price will be grown and dump at anytime since its own nature is volatile in the cryptocurrency industry.
Please wait for the bump to come and hodl your coins for long time.
Surely you will be profitable person in making money. If you want to get the make money think we'll and invest on bear market time.