I will predict that when we are capable of using lead to manufacture gold that one, gold won't be worth much
When I was about ten, I read a comic book story that went something like this...
A man is literally down to his last dollar. He puts it into a bank and drinks an elixir that will make him sleep for 500 years.
He wakes up 500 years later and goes to the bank to get his dollar. He is astounded that, due to compound interest, he is now extremely wealthy. He instructs the bank to put all the money from the interest and all new interest into gold.
He drinks another shot of elixir, wakes up 500 years later and goes to the bank. He is told that he owns almost all the gold in the world.
He drinks another shot of elixir, wakes up 500 years later and sees that everything is made of gold. He stomps down to the bank to see what's going on. He is told that a comet passed close to the earth and turned all metals into gold making it essentially worthless. "However," said the banker "you still have your original $1.00"
That silly story is more meaningful than your green tablets, your ancient wisdom, your immortality drugs, and your lead-to-gold stories.