Not at all. Bitcoin can't replace Gold. First of all,Gold is a tangible,precious metal with a value.it's a treasure for all mankind.it can be found and can be use by anyone.Gold can be used as a resource too.since the beginning of the World, Gold is already there.however, bitcoin is a digital currency that can be used and traded by the use of the Internet. When the internet is gone, bitcoin is gone too. Bitcoin is not a treasure to keep.that being said,you can't really compare bitcoin and gold to one another.they their own value and purpose.
The internet can't really go away though. I don't really see what you're saying. Bitcoin has value because of the underlying tech but its value is still largely speculative. Many coins do what bitcoin does but better and are worth much less.