elon musks priority is public utility.
by this i mean space transport
human transport
goods transport
electric generation

seems elon musk wants to make peoples living costs cheaper.
less taxes because gov aint paying large sums to service the international space station
less electric bills
less fuel bills
less travel costs

though quantum is a new industry. its not something thats gonna be consumer ready any time soon
the equipment needed to sheild a QC from light, heat and magnatism to remove as much interference to get a good measure of the things involved in QC makes it not a small object to have on a desk
(your grandkids wont have a quantum smartphone)

so i dont see elon getting in on the QC game just like he hasnt got into the 'cloud storage' computing game
he isnt into the science of terraforming mars. he is interested in the taxi to mars industry.
so i dont see him caring for the utility of QC for sciences. unless QC becomes expensive to lease hours of remote use. .. then he might just buy a few and sell time on it cheaper