It because bitcoin is more have a potential and it have a high value that give us many benefit and give us our need everyday,so many people still buying and invest in bitcoin.
Thats true, and I think they still believe on Bitcoin that it will be okay and go back to the higher price again. Bitcoin changes from time to time. You can definitely say bitcoin is useless because it is constantly changing. These people believe that changes will occur in the future that will bring back btc on a betrer state