There is a limit to the price that bitcoin can drop, at some point the price is going to be so cheap that people with a lot of money like whales will take advantage of those prices and will buy those coins and then the price will go up again, many people are predicting that the price is going to keep going down up to zero but that is not going to happen because bitcoin is still very useful, you just need to ask the people that live in countries that are facing difficult times.