hi, i have 2 questions about btc:

so there is a limit on the maximum number of btc available. that is 21 million, right?

so let's say one day that limit will be reached.

1. will mining be useless at that moment and therefore stopped?

2. what if someone looses a wallet? let's say someone has 1 million btc in his wallet and accidentally deletes his wallet.dat, which means that those btc are lost forever, right? will it be possible to start mining again to fill up the missing million?