Bitcoins will last as long as we do.  When we die the executors of our estates will have no idea what bitocins are let along what to do with them.  Bitcoins die with their owners.

I believe that Satoshi's bitcoins suffered this fate.  Satoshi met an untimely demise and his mom just donated his computers with all his encrypted wallet.dat files to charity.

MM is an inveterate troll...that's why I like him/her.

Of course hybridization tends to provoke the expression of positive characteristics, among them general intelligence.  Inbreeding is the opposite...it tends to produce racist scum who's populations are not self sustaining.