Any way you slice it gold would be less-valuable.
Asteroid mining is good for resource gathering, not accumulation of wealth. And even then it’s much more useful for resource gathering for use in space than on Earth. If you can launch once, then mine, process, and use the resources without having to do more launches and landings it’s much more efficient. Then you’d start manufacturing in space to further reduce the amount of required launches.
Fuel efficiency rules are idiotic now. The automakers used to classify everything as a truck to get around fuel efficiency regulations. The PT Cruiser being classified as a truck was the last straw, so the regs were changed beginning in 2012 to base fuel economy off of vehicle footprint to keep automakers from reclassifying vehicles. But that change had the consequence of effectively outlawing small trucks. Suddenly a sedan has less-strict economy standards than a compact van or truck.
Notice how the small truck segment disappeared in 2012, and when the Ranger came back in like 2018-ish, there were models of it larger than older F150s? It’s because the manufacturers learned they could just make the trucks bigger to get around standards.
It’s also why around 2021/2022 all the compact cargo vans (NV200, Transit Connect, ProMaste4 City) were discontinued. The regulations essentially outlawed small vans designed to haul heavy loads.