According to the ICA Factbook, the total value of the world's money is $80.9 trillion. This includes coins, banknotes, money market accounts, as well as savings, checking and time deposits.
The final supply of bitcoin will be 21 million. If bitcoin acquired 10% of the total value of the world money supply, the value of one bitcoin would be $385,000.
Yes, it's theoretically possible. However, why should Bitcoin ascend to the status as a major world settlement currency, when its underlying consensus and governance mechanisms are fundamentally flawed, and an altcoin with enough support can take this position instead?