History speaks for itself
We have gold and silver
We have bitcoins and litecoins
I don't follow. Gold and silver are physical items that have value that goes above and beyond what the metals themselves are worth (via jewelry and other items). You can't take a Bitcoin and twist it into a physical item that has other real-life uses. Comparing the two to each other is a little asinine.
As far as I know, silver is treated as an entirely different metal than gold is; it doesn't follow in its footsteps. Its value isn't based on what gold's is. So Litecoin, even if Bitcoin were to be "like" gold, would still not be comparable to silver.