Gold still has value now, not historically.
I'm not terrible concerned about harvesting asteroids in 40 years when I'll be almost dead. Frankly with the complete lack of public support for space programs I'm highly skeptical of it happening in my lifetime. Took NASA 40 years to get out of low earth orbit again, and yes i got up at 3am to watch the capsule slash down.
Of on a tangent slightly. Asteroid mining should be a major focus. One of the big monsters could supply a lot of material, plus the He3 on the moon.