Hmm,
1) What’s the range of a laser beam transmission.
2) Do the colonies on Mars employ lasers for telecom through space?
3) Does the underground national/global transportation system on Earth compare to that on Mars?
4) is Earth a colony of Mars?
5) Did the Mars Civilization move underground due to surface radiation contamination eons ago?
6) Is the Asteroid Belt the remains of a planet destroyed during a Space War ( as depicted in “Science Fiction” movies?
7) Are we on the verge of discovering the identity of all the Aliens visiting/living on Earth?
8) Are humans the offspring of Martians?

Asking for a “fren”
?

An interesting read is The Time Machine {1895) , by H G Wells, one chapter of which is devoted to this topic/process in which the Eloi (a happy, but defenseless population is preyed upon at night by a nasty underground Morlocks who kidnap the innocents to consume as food.

Again, Science Fiction contains much of reality.

Literally.
That’s what all the monuments were for, to include the famous “face on Mars”
So they’d be visible from Earth for future generations

No idea.
I’m just the recorder of history.
They all ended up on an island in the Pacific, owned by the UK.
They either relocated, or died.
We won’t know till we open a comm channel w Mars, which likely won’t be soon.
Likely on Mars though, since their skills would be needed.

Those relocated on 9/11 were essentially volunteers.
Those on Malaysian airlines were primarily technicians from an extraordinary Texas company that made stealth software that was quite advanced. They likely accepted a deal.

ETs have been coming and going w Earth for millions of years, watching human civilizations rise and disappear.

There are ET skeletons carbon dated at 100s of thousand of years old, giants and miniatures.

MJ-12 was the admin oversight for ET interface.
Officially, they set the initial terms, but got suckered.
Things gradually changed, but ET still had better weapons, so DUMB raids level the odds.
But, there’s more than one ET, so, alliances are made w Nordics and others.

We gained space travel in the meantime - so Ops to/fro Mars since VN. Black budgets covered those costs.

Mars was a good place to relocate plane loads of volunteers from 9/11 & Malaysia airlines.

Gold has maintained its value for centuries, and will continue to do so.
But, supply/demand remains a factor (as with diamonds)

Perception is the key.

Keep in mind that it is a key component of space craft, and our ET visitors need it as well; so, as demand increases, so does the value.

So, #Tore is correct in her comment that gold will increase in the long run.