Because people still believe in bitcoin and they are still buying bitcoin and I'm sure many new people want to get to know more about bitcoin or crypto world. Because the crypto world is very mysterious and wants to try to get to know more about crypto world.
Bitcoin has all the reputation and all the popularity in the market and its value is a unique one among all the crypto market coins or currencies. The Bitcoin is still accessible and the even its lowest value is more than that of the 2nd holding currency in the market and is a reputable currency in the market. This investment is in the benefit of people are they are still investing in it.