In my own perspective, I think it is just fair for Bitcoin to drop because of its volatility. Bitcoins price will go up again after some time, just be patient and You'll see that the price will skyrocket again. I think the drop happened because the value of Bitcoin has reached high volumes and it has skyrocketed by more than 50% of its current price in 2017. The drop is just a repercussion of the sky-high price of Bitcoin in 2017, the price will return to its normal state sometime this year. Although You have to be patient and hold You Bitcoins if You want to return the value You have invested.