1 Bitcoin = $1,000,000 USD
21 Million Bitcoins = $21,000,000,000,000 ($21 Trillion USD)
You know that this is impossible to happen even the richest man in the world does not even have that much money. I am sure that you will not be able to earn that much money with Bitcoin.
that doesn't even make sense.
why would the richest man in the world need enough money to buy all bitcoins?
the richest man in the world doesn't have enough money to buy all euros either, that doesn't collapse the value of the euro.
The richest man in the world can't even afford all the gold in the world either, that doesn't crash the gold market.
Your argument is just so bad.