With the known largest bitcoins holders e.g. Mr. Nakamoto, North Korea, Saudi Arabia, NSA, and Winkleboss Twins.
These bitcoin holders accumulates over 2 million bitcoins in their wallets. How many bitcoins do you think left in circulation?
zero!
simply because with your definition, someone who has bought bitcoin or mined bitcoin (Winklevoss, Satoshi,...) has that amount out of circulation and every single person out there who has bitcoin has bought or mined bitcoin so their coins should be out of circulation by your definition, and it shouldn't matter if it is 0.0001BTC or 1000000BTC and the total of that is equal to the number of coins that are available.