There is a misconception that when the price of a Bitcoin goes down, it loses its value. To unravel this misconception, we have to look at Bitcoin in terms of its overall market.
If the price of one Bitcoin is $50,000, then that is its current price in fiat terms. If the price per coin goes down from $50,000 to $25,000, the common thinking is that Bitcoin just lost half its value. But this price reduction is only terms of its relationship to fiat currency. In reality, one Bitcoin is still equal to one Bitcoin.