Actually, $1000 of silver has 100x the volume, because gold is 69% denser than silver.
But even $1,000,000 (60,000 [troy] ounces - 1866 kg, or 600 paperback-book sized 100 oz. bars) in silver can be stacked in a cube 57 cm (22”) on a side.
The challenge with silver really is not space, because you can fit a million worth in a thousand dollar safe. The challenge is weight. What do you do when you want to *sell* two tons of silver? Send it in to the broker in 70 lb Priority Mail flat rate boxes?
How about if you want to move it in a hurry?