A crypto being backed up by silver/gold is a great thing, enabling an easy way for anyone to collect their share with the ease of a mobile device. Only thing is though, you need to be certain that the one providing these services and claiming it to be backed up, has actual credentials (be trustworthy). I quickly heard something mentioned in one of @Stan's interviews about a gold backed company with actual credits and government ties that was about to partner up with Bitshares.