The Lightning network can transmit anything, but it can only transmit Bitcoin trustlessly.
Afaik, the system requires conversion to and from Bitcoin to make maximum use of the network, so it will be used to send Bitcoin only. The trust and currency will remain at the edges... just like Strike.
I just think it is dumb for Lightning Labs who champions LND, to favour development here instead of working on the protocol and things like BOLT12. 🤷