1. It doesn't have to be Gold, it could be a basket of...

1. It doesn't have to be Gold, it could be a basket of commodities, but money has to be backed by something, not nothing.
2. It doesn't need to be explained, it's just how it was until the late 70's in the US.
3. You're making this claim to help your argument. There will be a USD collapse at some point, just like many other fiat currencies before it.
4. That's one opinion, anyone can have one, but you're doing a bad job of making it a compelling one.