Purple snail snot

Tyrian purple dye, which was, in truth, purple snail snot, was extraordinarily valuable in the ancient world - worth three times its weight in gold, at a time when gold was extremely rare.  We look at our possessions today, things we highly value, and we ask: will they be the purple snail snot of the future?  And what about that other incredible valuable item, given to us by God...?