First: Bitcoin survives thanks to mining.
Second: Bitcoin has already been through falls and several bearish trends. This is a very persistent asset. Its system is designed in such a way that rate corrections and other adverse market conditions will not pose a threat to the existence of Bitcoin.
Third: it is very banal, but it is used by a very large number of people working with cryptocurrency. Bitcoin is like a dollar, only in the cryptocurrency world, well, it is worth an order of magnitude higher)
Well, another thing that can be said is that they invest in it and sell it and buy it. And this keeps the market going
Of course, this is all very superficial, but you should not worry that it will start to fall heavily at some point (although I think that when it falls heavily and then there will be a strong jump)