Why did our Ancestors and Ancient Aliens use Gold?

 I think I just cracked 'Why were ancient aliens mining gold on Earth?' 

Because the magnetic field/shield on their planet had completely eroded and they were exposed to their Sun's radiation.

Yes gold shields us from radiation that's why NASA uses it for astronauts. That's why our ancestors wore gold, esp on all the chakra points.

Did you know that the Earth's magnetic field shields us from Solar radiation and it is eroding at a faster pace and it is about 25% weaker now than it was 100s of yrs ago? Do the Solar storms and sun's radiations is affecting us more now.

Image 1: Earth's magnetic shield degradation

Image 2: Google search results