I think that gold could lose its value in the next decades, because there are already plans and ideas to mine valuable resources like gold and platinum on asteroids.
On asteroids?

Anyway, the point was not really about the value of gold or Bitcoin in the future but rather as how Bitcoin is compared to gold. The store of value story, or a saving account to make it short.
Someone above was comparing the gold market with real estate, it's a horrible comparison, both aren't even comparable in any way.