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?
The cap on maximum number of bitcoins can be increased but it will not be satoshi who increases the cap it will be the developers team, all they have to do is change the source code but by doing so there are chances of people leaving bitcoin as the main reason i use bitcoin is that it have a hard cap on maximum number of coins mined.