[ertian]

This...cannot possibly be right. It's estimated that there are a minimum of 200B galaxies in the observable universe (up to 2 trillion). 50B tons of gold in the universe would mean 0.25 tons per galaxy (shared among the ~100B stars, and let's guess 500B planets)--but we've already extracted ~250k tons from earth alone.

50B tons seems like a suspiciously low number even just within our own galaxy.