As our father's father and their father and so on. If it continues back to 2-3 lac years, are the years till which all existing 8.1 Billion specifies has single Y-chromosomal Adam (Y-MRCA), and same way our entire current humans's mother's lineage, Mother's mother and their mother and so on, Most Recent Common Ancestor, Mitochondrial Eve(mt-MRCA) exists somewhere 2-3 lac years.
Same way, in our 8.1 Billion people there must be one Y-MRCA and one mt-MRCA for entire future human binegs of, may be, different time like 1 or 2 lac years from now.
Who will be the Y-MRCA and mt-MRCA, whether they might be reichest, poorest, beautiful or handsome most, high power politician, to a leader or who is the Y-MRCA or mt-MRCA of the humans exists after 1 or 2 lac years.
As its as much sure that there won't be any break in the patrinal or matrinal lineage of me for 1 or 2 or even lacs of years ago. Sameway, in future, not sure about my own lineage but there must be some one of our entire human existing presently, must be the Y-MRCA or mt-MRCA of the future.
So what now....
The purpose of our existence, to safeguard our human evolution or making safe and healthy of entire species of the earth. or to be in peace with entire Universe species, if we meet them all in future.
