I heard that many people lose their coins and the current volume of BTC is not current at all)
How do you think will Satoshi add some in future?
It could be that only a few owners can take it back with the various conditions set by the authorities. So we must be able to run well so that the possibility of missing coins previously can be returned in accordance with the previous amount because bitcoin often experience a fairly rapid price change.
It is one of the reason why bitcoin is worth something because of the determined number of coins that will be available in the market after everything is mined. What is the use of having additional coins in circulation? If coins can easily be added in the circulation then bitcoin will just be like the dollar that you have in your zinga poker account.