It basically means genetics though I'm not sure this is the most literal translation in english.
The term is mostly used in connection with biology and also with deseases and such you "inherit" from your parents.
I don't get the estibot value. In terms of development and/or monetization it's not that strong in my opinion.
Furthermore; the cctld dot nl is quite strong in nl so a lot of visitors will tend to go to the site with this extension. Come to think of it, the developed dot nl probably influences the estimated value of the dot com quite alot.
All in all I don't it will fetch this kind of money but you never know.
Maybe some other dutchies can shed a light on it?