I am sure that children who are the future generations will not get the opportunity to mine, but they will become new pioneers in the digital industry. Even if the year 2140 really will happen, I am optimistic that there will be more innovations and advanced technologies that will be created by future generations in the world of cryptocurrency. would even outweigh the current reward mining system.
Yah true, I think something better will have replaced the current systems by 2140.
Heck they might be smart enough to create a system where no matter what decade you are born in, you get a equal chance to mine rewards.
Heck they might be really smart and create a system where people that are already born get to backtrack to their birthdate and collect all the rewards they missed.