1) Has been used for millennia. Bitcoin was invented ten years ago.
2) Accepted as valuable by most of human population. Bitcoin mostly as valuable within internet echo bubbles.
3) Although price fluctuates, it's more stable than that of bitcoin, thus better suited as store of value.
4) Has applications for industrial uses or for jewelry, guaranteeing that your gold retains at least a base value. Same cannot be said of prime number data structures.
5) Doesn't corrode and doesn't depend upon hardware or storage media to be working.
I'm not saying that people should hoard gold, just that bitcoin is a pretty poor substitute.
And, BTW:
> No countries win the gold-geography lottery (Your country that has no gold reserves can still accumulate)
Pop quiz: the population of Germany is roughly on par with the population of The Democratic Republic of Congo. Do the citizens of the two countries currently hold the same amount of bitcoin? If not, how come?