[...] Is it impossible to increase the bitcoin supply mining new bitcoins further more ? Thanks in advance
Why would one want to increase the Bitcoin supply?
It is technically possible, but doing so would negatively impact the price. It is likely never going to happen.
It would simply lead to a hardfork that will likely find no community acceptance -- meaning the original side of the fork will stay dominant, leaving increased-supply-Bitcoin-hardfork as an alt. It follows that the price of unchanged-supply-Bitcoin might stay largely unaffected while increased-supply-Bitcoin will be left in the dust.