Not to high-bandwidth usage. Such low frequencies have some unique properties, but most of these properties are no longer needed nor useful, and even the cases where you do want e.g. extreme single transmitter range, we can now do that with much higher frequencies and bandwidths in much lower power envelopes than kilohertz transmitters.
It is only valuable in the sense that it is a very limited resource.
It is only valuable in the sense that it is a very limited resource.