From 2099 till 2140 (when the last satoshis will be mined) there will only be one bitcoin mined. By the end of the century, supply is virtually fixed and limited to the maximum of 21 million. For the following forty years, miners will be mining only one bitcoin...
By that time we are no longer exist in this world, let's just put the worry to the next generation. what we have today is what they will have tomorrow. Our part is to make people listen to us about how bitcoin will help us in the future, like, for example, the pandemic we are facing today. it could have been a big help now if they just listen long ago.