Yes once the price dropped we can use this opportunity to invest more in bitcoin. Because if the price is very high means we cannot able to buy bitcoin at that time. Now the price of bitcoin is dropped so much so buy more coins and hold the coins for long term still the market recover. Once the price goes to high you can sell and gain more profit than you invest.
Price of bitcoin already trading too much. Therefore i think that investment in bitcoin in current price can be too much profitable, if you will invest money in bitcoin right now i think it will give you a good profit after some time. You just need to wait for some time because most of the expert view is that bitcoin price will start increasing in next months.