Rav Yitzchak Zilbershtein, Rav of the Ramat Elchonon neighborhood of Bnei Braq, issued an interesting psak regarding selling unused land in Eretz Yisrael.

Someone inherited a piece of land but had nothing to do with it. The parcel of land is located in a rocky and mountainess area and he basically has nothing to do with it. He came to Rav Zilbershtein asking about the possibility of selling it.

Rav Zilbershtein responded that right now it seems worth little to him but in the future one day it will be extremely valuable.

This is not just astute real estate advice being handed out by Rav Zilbershtein, but something more esoteric.

Rav Zilbershtein explained that in the future the value will jump and increase tremendously. He quoted a "Chacham Laniado" who said (quoting a medrash) that all the stones of Eretz Yisrael will be very valuable as every single stone has a hidden "segulah" associated with it but at some future time all those segulahs will be revealed.

He gave some examples of stones that will be good for causing peace (Netanyahu and Abbas should get some of those now!), others that relieve tooth pain, stop bleeding, cut through other stone, remove kidney stones, etc.

Rav Zilbershtein concluded quoting his brother in law Rav Chaim Kanievsky that mashiach is going to be coming literally at any moment, so the land is surely worth holding on ot until it will be very valuable in the days of Mashiach.
source: Kooker