"The $1 million dollar Bitcoin argument predicates that the total market cap of Bitcoin in the world would amount to $16.5 trillion. This compensates for the approximate 4.5 million Bitcoin that have been lost and are now unrecoverable for various reasons."

A must read -

Thank you that is a great article, alot of very good info there. It's certainly possible for bitcoin to reach this amount if it's spread out amongst enough users and the demand is high enough.