You can’t move anything there, it’s a “character special file” that can’t be deleted. If you pipe something there, it does nothing. (As opposed to something like /dev/stdin, that prints what you pipe to it on stdin.) Character special files act kind of like named pipes, except they’re handled by the kernel on one side. They’re raw device files.
The conversation in this thread reminded me of a thing I saw on Reddit ages ago, of feeding /dev/random into aplay with some parameters I unfortunately forgot, to get a series of random noise that sounds almost musical.
Without the parameters you just get white noise sadly.