That is incorrect on many levels. Gold has applications in MANY things. I bet the device you used to type out that comment has a bit of gold in it.
The comparison to BitCoin and paper money makes more sense, but it doesn't. This is because BitCoin has no one backing it. If the dollar drops, well the US is backing it; and they will be forced to deal with the consequences. If someone pulls the rug out on BitCoin- might never happen, but who knows- then no one is responsible. BitCoin is a fun game, and that is all it should be. Such rapid deflation will not go on forever.