Land beats gold
In the present financial uncertainty, people are fleeing to gold for safety. Such is the demand, with soaring gold prices, that banks are charging more to store it, following the surge in demand for precious metals, which has left London, the centre of the global bullion market, short of vault space. Almost all of the major bullion-dealing banks have raised fees since March this year, in some cases more than doubling the rates they charge for vaulting gold, according to clients of the banks and people familiar with the situation. Link to FT article
This sounds more than a bit like rent. Of course extra vault space can be easily created in some industrial estate but then that brings the added cost of moving the stuff around securely.