Why worry for the future generations who will live for the next centuries? Of course, they will have their own share as well this is not the end for some people who didn't get any chance to get some block reward because there is always a chance to get some profit because the technologies revolving around Bitcoin is evolving as well in the next 10 years the lightning network will be fully recognized and there will be lots of convenience apps to improve the transaction speed and some other apps developed to give those people some extra income as well.