I just like the way the sparkly gold looks when it is worn by my lovely wife. If it costs me less to buy it tomorrow than it did today I will just smile and buy more.
For a thing to function as a reserve asset it must exist in the form of tradeable wealth. The SDR has a long way to go before it is that. Of course, if they intend to back it with gold that's another matter. If they want to back it with existing paper currencies then its use adds no value to...