It's less than 1.2 megaHertz, not kHz.AM radio does not have to die. There are several gigahertz of terrestrial spectrum and I can't see why a measly one and a half kilohertz of that can't be left open for more simple transmission techniques, where simple receivers (crystal radios) can continue to be built and enjoyed and get people interested in learning electronics.
i don't think that there are any people interested in building crystal radios today because young people would find nothing of interest to listen to in most parts of the world.