Most of the people who are still buying are people who believe in the encrypted world, and they believe bitcoin will come back, which has been in history in the past.
Because they believe bitcoin will become a digital currency in the future. Trust is something that makes them not care about people's analysis or people's doubts, because bitcoin's popularity cannot be stopped. Bitcoin is starting to be accepted in many countries, many businesses also accept bitcoin. Bitcoin is still bought, in addition to trading as well as investment. In the future no one knows, but belief in bitcoin will not falter.
Additionally, most of the people know that Bitcoin has a great potential to grow. We also remember the jump of BTC when it almost reached 20 thousand, and hope something like that will happen again.