they are not lost they are forgotten.


look at it this way you have 100k in gold and you stored it in a place no-one can find, like lost treasure but this treasure can't be found by seekers.

people can come along and call it thiers if they spend more power and time a computer can do the forsean future of well end of universe as anyone knows it.....

so yes people toss it away in theory it is lost forever just like time and work in real world life....

but luckily each bitcoin mined can be divided so even though there is loss there is value, just like anything.

anyway that's how I understand it all, correct me if I am wrong.